I just found a site called dirtynoir.com and it looks like they are accepting short, 1000 word or less noir crime fiction submissions. Their site concept seems pretty cool, I'm contemplating writing something for them...
heres the link for their guidelines:

http://www.dirtynoir.com/p/submissions.html

(heads up there is a pic of bare buttocks on their page header, also they use profanity all over the site).