In preparation for the upcoming release of Silverlight 2, we have released Silverlight 2 Release Candidate 0 (RC0) to developers to start the process of updating their code. Scott Guthrie just wrote about this in his blog yesterday. All of the details, including a breaking changes document are here http://silverlight.net/GetStarted/sl2rc0.aspx and here. As I have written a number of samples that use Silverlight 2 Beta 2, I will be going through this process with you as well – and blogging about it. When you encounter problems, your first resource should be the forums on the Silverlight.net site.