Today is a very, very cool day. Windows Communication Foundation (the API Formerly Known as Indigo) shipped RC1 to the world. You can get the bits right now.
And when we say "release candidate", we mean it. As Clemens says, there are only a "handful" of active issues in the bug database (and you don't need very big hands). The time has come for us to ship, and believe me, I can't wait to get this in the hands of our customers.
So go, play with the bits already :)