Europe has this (below) version that I'm sure you've seen. It sticks to artists though. Never saw this site. Does one, add one's self? Is that correct english? http://www.lambiek.net/
And yes, an IMDB for comics would be wonderous. For comics journos especially. Write now it's a hop and a jump between www.cbdb.com, www.comics.org, and calling up a comics retailer I know in GA with a mind the size of the texarkana.
I think a site that could do it would be The Comics Price Guide. At least, if more people would submit writers and artists. With quantity and cover scans alone, I generally go there.