Well, it is out there and ready to be used in Public Beta.  Check it out at here. The project was developed using a combination of Agile Practices and a practical use of eXreme.  The Silverlight/WPF team worked hard to get out a quality public beta.  However, it is beta, and we expect to hae some bugs.  That is why we need you to download and use the SDK and get us feedback.  So that you know who the members of the team are:

• Art Haddad
• Morten Nielsen
• James Goodrich
• Rex Hansen
• Rich Zwaap
• Bob Flores
  

One thing I want to point out is that the Interactive Samples, as powerful as they are, are truly meant to demonstrate the use of the API's and to help you get started.  Not be "out of the box" sample applications. We will be putting together some sample applications in the coming weeks that do demonstrate the use of these API's in real-world applications, until then, consider these a way to help you get started - more of Programming with the ArcGIS API for Silverlight/WPF 101.

We will be at ESRI's Dev Summit 2009 and available for all of those who are interested in talking with us.  I know we want to hear back from you.  So, download the SDK, start building some apps with it and let us know what you think!