In case you haven't seen this yet, Gaston Milano has released a Xaml viewer/editor that runs inside Visual Studio 2005 Beta 1. Very cool indeed! I set this up on a test machine and got some of the other VS Extensibility folks to check it out. Needless to say, some jaws hit the floor :-). This is an excellent demo of what you can do by extending Visual Studio. Great job Gaston on a very cool demo!