Graphic Novels

With the new responsibility of selecting materials for the Graphic Novels collection I am doing what a librarian does first – gathering information. I have found some websites, http://webserver.mcl.org/subj/grafnov.html and http://bookshelf.diamondcomics.com/public/ for example, and borrowed a book from the CMRLS Professional Collection. Also as a typical librarian, I read a few of the graphic novels already in the collection. All of these sources have provided useful information, although they tend to be geared toward YA collections, while I am buying for the adult collection. Does anyone have another source of information, or a favorite artist or series?