Nice work, priority-wise I'll nominate a search function.

I also think the ambiguity / WTFness of being able to comment on a wiki page or in a separate forum for any given artist would be a good one to tackle, in terms of finding info / navigating / good visitor experience stuff.

Shut down comments on wiki pages and automagically link to the appropriate artist forum with a "click here to discuss this" type link?

Go the other way, and automagically generate blank wiki page for every artist in the artist forums, consolidate the comments from the artist forums to the wiki ones, then destroy that forum? Ouch. Sounds like lots of work.