The new MSDN Forums

If you haven't already, be sure to check out the new MSDN forums site that just went up recently. It's got a ton of different message boards and there's already plenty of activity going on.

If you want to jump straight into the C# related forums, head over here.

Also note that each forum even has an RSS feed you can subscribe to to stay up to date. For example, here's the C# language feed.