Ah.. my old team has just shipped Beta 6!Congrats!
To those of you who haven't played with it... you should totally try it out. The tutorial is pretty good, and it'll amaze you how powerful it is. The .NET Framework is at your fingertips!
It is available here: http://www.microsoft.com/downloads/details.aspx?FamilyId=F5BB7DEF-7C71-40D0-9AD7-81E60E85E3DB&displaylang=en