So after seeing Anders presentation about the Future of C# at PDC – I immediately went and downloaded the CTP to try it out. At some point in the last couple of days and maybe when I installed the ASP.NET MVC 3 RC Visual Studio started to freak out on me. While debugging I could no longer view variables in the Watch, Autos, or Locals window. The windows were there, but there was nothing in them and when I put a variable in the Watch window it said it could not evaluate the expression.
Thankfully after uninstalling the Async CTP VS2010 returned to normal function (kind of useful when debugging to see variable values).