I just heard about this site via LiveJournal:
http://comicjobz.com/
Don't be surprised if a majority of the so-called jobs are of the "I can't pay you anything, but it will build your portfolio!" or "You'll get a percentage of the profits (assuming that there are any and that we don't write off everything from our hotel rooms to paperclips)" variety, but hopefully as it grows more freelancing positions will be posted.
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I live under a bridge.
