IMHO, this is one of the best comic book websites I have ever seen. It's dedicated to just one character, Daredevil. You can find anything and everything you could possibly want to know about Daredevil at this website. Please check it out.
Excellent website dedicated to a group of people in comics that are often ignored: WOMEN. Jeanne Burch does an incredible job of cataloging and biographing the women in comics. Excellent reference. A must-see website!!
Very cool website about all the bad guys in comics.
A great European site. If you want to check out some of the great comics coming out of Europe, this is the place to be. NOTE: Site is in Italian, so you may need a translation site like Google.