I was just posting in a thread about gps trackers, when one of the other members remembered some software I was using....and i got to thinking. What if there was a was of storing software, skills, geek bents where if there was a question on a topic you could @ them, or there's some sort of notification when a topic is posted on your interest.
Probably leads on to topic tagging or something. But was just an initial thought that floated through my head.