Yeah, I'm groking CodePlex and loving it. There's a great feature that I just did for the first time. A user posted a message in a forum (the first forum post! And there was much rejoicing!) about clicking on categories which would cause nothing to happen. This is due to a change in the way forums were being retrieved and something I had to fix. You select the forum post and click on "Convert to Work Item". This does two things.
First it creates a Work Item where you can track the feature/bug/whatever. The second thing it does is post a message to the thread saying it's been converted to a Work Item and telling people to track it there.
This is the way cool technique to implement features and fix bugs. There's no loss of tracking a suggestion (if you choose to create a Work Item) and really ties things like requirements to work done.