When we built features for Channel 9, they can often fit into a number of buckets, like:
new areas of the site (like the new coding 4 fun area)
The feature above of the sharing via FB / Twitter was added to a number of areas in this minor update. We added the ability to share projects, show pages with the idea that when people do this it helps build awareness of the content to other users and more people coming to Channel 9.
One of the things we've often tried to do with the coffeehouse is treat these forum posts with more equality to our videos and with that allow people to share them on the same terms as they would other content.
Thanks for the feedback on what you want done with the forums.