Just a quick thought but how about adding a little area under "search" but above "who's on line" linking to currently active chip show streams?
Could have something like
Currently streaming :
US,NY Blip Festival 2012 (this is a link to the stream)
Aus Mel Soundbytes 10 (this is a link to the stream)
This would obviously need either some users to have access to that bit of back end or some kind of mod curated sticky list of streams created by users, both of which would have possible problems but I thought it might be worth knocking the idea around?
