Have you found any bugs, unknown issues (vs. known issues), or any wish list items?  Go to our Connect site, sign up for the Parallel Extensions to the .NET Framework connection, and start giving us direct feedback. 

While the blog comments and forums are a great way to raise concerns, ask how-to questions, and engage in a dialogue, the Connect site is the best way for you to report an issue or log a feature request–you can file bugs directly into our work items database.  And, the Connect site is great because we can respond to the issue, you can see our progress on it, and others have a chance to see, discuss, and rate what is there.