Check out ComicSpace.com!
I'm a sucker for cool networking sites, and when my pal Paul Ens told me all about ComicSpace.com -- a Myspace-type site that's only for comic book fans, artists, writers and publishers -- of course I had to sign up!
Comic book artists and writers show off their work in galleries on their profiles, and post bulletins about their work in progress. It's a great site to promote your work if you make your own comics and comic art, but also a splendid place to hang out if you want to discover new comic book titles and artists.
Check out my profile on ComicSpace