A few weeks back, Google released their Social Graph API – a JSON service that gives you access to Google’s information about your online presence. A C# wrapper is available for download at the bottom.
How it works
This video explains it better then I can:
Try it yourself
The wrapper is just a single small class that you can dump into your App_Code folder and you are ready to go. The demo web page is also included in the download so you can see how to use it. It’s just a single .aspx page.