MacInsiders "Groups" feature will soon be launching. We're hoping to turn it into a service to bring together groups of friends. The actual title/name of the service is yet to be determined, but it'll sound cool. Get your friends together, open up your own private section of undrgrads to chat secretly amongst yourselves, or make your group public or invite-only! The fun will begin in about a week...
Tiny update: Photos can now be easily attached to forum posts and auto-generate thumbnails. In other words, you simply click the 'manage attachments' button, choose some pics on your computer, click attach, and blamo... they are added to your post!
See an example.