Codeplex always has great resources for practical use in .NET Development. Recently, a Social Viewer Template has been released for the Windows Phone 7 @ http://socialviewer.codeplex.com
With this release, you can easily create applications which interact with popular social media applications such as Twitter , Flickr, and Facebook. Using the current stable release, I modified the code to include my Facebook application ID and API Secret to allow posting, as this was broken. Also, I added custom support for Microsoft Pub Center ads. After pulling some media resources from the world wide web and creating the image assets, I arrived at the following final product.
Check this application out if you are a fan of Michael Phelps, as he will no doubt be something keep up with in the 2012 Olympic Games in London!
Here is a video of the final product: