If you aren't already aware of it, check out Drawn. Drawn is a graphic arts blog with several talented contributors. I especially like the work of Jared Chapman, who has a portfolio site of his own. Many of the contributors to this site have their own blogs as well which are well worth a look. I especially enjoyed Ward Jenkins' blog.
While you are over at Drawn, be sure to wish them happy birthday, as today marks the one year anniversary of the site.