Today MySpace announced support for Silverlight on their Open Platform. Yes, you can start leveraging the power of .NET in your MySpace apps. How cool is that? You can get the details here.
You will be able to download an open source MySpace Silverlight SDK on Thursday from CodePlex. Remember, the SDK is not on CodePlex yet, but check back on Thursday.
For more details and some sample code, see this blog post.