Today we had a major deployment of what we're calling Release 7 of forums. The major work behind this release has gone into increasing our ability to scale and offer you new forums, while facilitating our migration of the remaining forums on http://forums.microsoft.com.
There is one new feature you may be interested in as a forums user.
Live Search is now the forums search provider!
If you search a category or forum you may notice a strange looking GUID being added to your search. The GUID is used to help scope your search to the context you've asked for, so if you want to go back to global scope, you can remove that search text.