One thing I have learned from participating in several wiki projects — from Wikipedia to my libraries’ FAQ/Policies wikis — is that it takes a lot of work to populate and maintain a useful wiki. One of my favorite uses of a wiki is Whole Wheat Radio (which seems to have disappeared recently).
The streaming radio station out of Talkeenta, Alaska, switched over to using a wiki to maintain information about the artists played and available albums/tracks. Users could contribute as much information as they wanted to. For a while, I was addicted to adding content to it. Part of why I haven’t listened much in the past few months is because I would easily spend an hour or two adding data to the site every time I turned on the stream.
If the site ever comes back, I recommend you check it out. Aside from the wiki aspect, anyone can play DJ and pick the songs they want to have broadcast. Pretty cool!
side note: It appears that the music, at least, is still streaming.