Gowalla is a service that has been getting a lot of buzz lately. If you're not familiar with it, it's a location-based social networksing service that comes in the form of mobile apps. Gowalla announced today, the availability of Gowalla 2.0 for the iPhone 3G and 3GS platforms.

Gowalla highlights the following new features with this version:

- Design – Gowalla developers have created a fresh new experience that is more flexible, readable and usable.

- Photos – Gowalla 2.0 gives users the ability to not only check in and create new spots; they can also upload a photo after checking in, browse photos from friends and see photos taken at that spot.

- Checkin Commenting – Now when a friend checks in someplace, other users in the community are able to tell that friend what they think.

- Multiple checkin messages – Users now have more opportunities to add messages even after they’ve left a checkin spot. Skipped typing a message? Come back and add one.

- Hot spots – The most popular spots nearby will be highlighted for users in a particular area to discover.

- Browse friends – and friends of friends. Browsing friends’ bookmarked spots and creating trips are two new features put in place by Gowalla’s developers by popular demand.

- Facebook, Twitter and web links – Building your Gowalla network is easier than ever with more ways to stay connected with friends through Facebook, Twitter and web links.

- Spot details – Address, phone numbers, Twitter names, Facebook pages and website will now be available in several checkin spots.

Gowalla will be heavily involved in SXSW (of which WebProNews will be covering the Interactive portion). Gowalla has updated its SXSW mini-site that details all of the SXSW initiatives the company will be rolling out, including: real world rewards, competitions, challenges and events.

StumbleUpon has launched a new advertising system, which the company says helps cost-effectively deliver advertiser content to targeted audiences, while increasing the opportunity for content to go viral.

StumbleUpon finds and recommends ad content it deems relevant to targeted audiences' interested based on demographic and topic areas. StumbleUpon users by simple nature of the site choose the content topics of interest to them, and are delivered random content based on this). This makes for an interesting way of delivering ads.

"With StumbleUpon Advertising, we’re solving the challenge of how advertisers can get more content that is relevant and impactful in front of their targeted audiences," says StumbleUpon CEO and Founder Garrett Camp. "We are dedicated to providing the tools that help advertisers identify and reach their audiences, measure campaigns effectively and gain real-time user feedback."

"After testing the StumbleUpon Advertising system for eight months, we know it's an extremely cost-effective way to drive qualified traffic and let the content speak for itself," said Jason Clement, Director of Findability at Wieden + Kennedy. “Since StumbleUpon Advertising targets content to users based on their personal interests, we can be confident that our content is reaching the most receptive audience possible. And when an audience enjoys our content, the reward is a healthy amount of free, organic traffic."

"StumbleUpon Advertising makes it easy and cost-effective to deliver the right content to a new audience of our target users," said Ben Tider, Assistant Director, Audience Development at Time Inc. Lifestyle Digital Group. “With streamlined campaign set-up and management, we can better optimize ads and recommend content based on the individual user. Because readers can self-identify the types of content we show them, they are more engaged and likely to share it with friends."

"StumbleUpon Advertising enables brand advertisers to serve up compelling content while users are searching or ‘stumbling’ around the Web," said Josh Spear, Founding Partner of Undercurrent. "With StumbleUpon Ads, an advertiser’s content is not an interruption, but rather a fully integrated experience that affords an opportunity for additional exposure when audiences like or respond well to the content. It is comparable to a banner that becomes more cost efficient based on positive viewer feedback. The new user interface also greatly enhances the service by delivering advanced analytics and more detailed campaign management tools."

StumbleUpon claims to generate nearly 600 million recommendations per month for its community of almost 11 million members.

Related: About a year ago, we interviewed StumbleUpon's VP of Business Development about advertising on the site.

Google has launched the Blogger Template Designer, a way to customize the look and feel of your Blogger blog.

"Over the past few years we've worked to scale Blogger and ensure that it is capable of handling hundreds of millions of pageviews per day," Google says. "But we also believe that blogging is about self expression and that an important part of expression is creating a custom design that expresses your unique voice. So last year we started working on a tool that would allow everyone to easily customize their blog’s look and feel, and today we’re proud to introduce the Blogger Template Designer."

Features of the template designer include:

- 15 new templates (with more on the way)
- Custom blog layouts with one, two and three columns
- Hundreds of background images courtesy of iStockphoto
- Customizable colors, fonts, and more.

"While alternative offerings force users to choose among a limited set of rigid template designs, Blogger provides an intuitive yet powerful interface so anyone to customize their blog's design & layout - putting the user in complete control," the company says.

It's interesting that this kind of customization has not been available from Blogger until 2010, as Blogger itself is over a decade old, and has been Google-owned since 2003.

The Blogger Template Designer is available through Blogger in Draft, Blogger's testing ground/sandbox site.

Last fall, Twitter started including geolocation information in its API, but it was not available through Twitter.com. That appears to be in the process of changing now.

This week, Twitter has been rolling out (it appears to still be in the process) geolocation info on tweets at Twitter.com. Various reports from users have been circulating, with those who have access to the feature pointing to a little blue icon by the tweet source on individual tweets, which when clicked, shows location information on a Map (powered by Google Maps).

The feature (as most new Twitter features do) is already receiving some criticism from users who have access to it. For example, Kim-Mai Cutler with VentureBeat says Twitter's geotagging is "far from what Twitter needs to be a real player in location."

Cutler adds, "First, the new maps feature isn’t turned on for Twitter’s search results. The whole point of location-based search is to be able to find what’s actually happening around you right now. Instead, Twitter tosses a few such tweets into a wash of noise..."

Earlier this week, news of Facebook readying location features surfaced. The company is expected to launch something along these lines at its f8 conference in May. Location players getting the most buzz currently are Gowalla and Foursquare. They you have Google, of course. This may be the most interesting space to watch as the year progresses. It will be quite interesting to see how mainstream location sharing becomes when it comes to consumers.

Are you seeing the geolocation information showing up at Twitter.com? Do you intend to share your location when tweeting?

Motorola has announced a "global" alliance with Microsoft, which will see Bing used as the default search engine on Motorola Android-based devices. The move begins in China, where obviously there is some turmoil between Google and that country, but again, this is being called a "global" alliance that is "launching" in China.

Motorola says that users will get a pre-loaded Bing bookmark on their mobile browser, and an enhanced search widget with Bing integration, though users will be able to customize their devices and select their own search provider.

"We believe that consumer choice is one of the most critical components to ensuring a rich and seamless client experience," said Christy Wyatt, corporate vice president of software and services, Motorola Mobile Devices. "Motorola and Microsoft have enjoyed a longstanding collaboration and the addition of Bing services to our Android-based smartphones in China is another important step in empowering our end-users."

"Mobile devices continue to be a critical place for customers to access location-based services such as local search and mapping," said Yusuf Mehdi, senior vice president of the Online Services Division at Microsoft. "We are pleased to expand our long-standing relationship with Motorola to bring powerful Bing location-based services to Motorola's innovative new mobile devices, providing consumers with more choice and flexibility in mobile search."

This is the second time in about a week Motorola has made news by offering non-Google search options on its Android-based devices. The recently launched Motorola Backflip comes with Yahoo.

Bing search and maps will be available on Motorola Android-based devices in Q1 2010 in China. No other expansion of this has been announced, but the phrase "global alliance" certainly leaves room for speculation.