"Whatsup" is a sample Azure cloud app. It is a simple web page where you enter your name and status (what you are doing right now) and see the status of others. Similar to what you see in more deluxe form on site like Facebook.
Whatsup is a "Web Role" cloud service project, consisting of an ASP.NET front end. It stores and queries status info using SQL Data Services (SDS).
You can use Whatsup with any Azure account - specify your credentials (username, password) and SDS specifics (authority container) in the Web.Config file, publish to the cloud, and you're good to go.
For a much more sophisticated application, see the LifeTracks social networking web site project on CodePlex.
Contributed by Microsoft Partner Neudesic.
David Pallmann (http://davidpallmann.blogspot.com)