You may be familiar with the site, Writer Beware, a watchdog of scammers in the publishing industry. Now the watchdogs themselves have a blog:
At Last! Writer Beware Blogs! A.C. Crispin and Victoria Strauss Reveal All!
Make sure to check out their sites and links. Be warned: scammers prey on unpublished, hopeful writers. Get educated before you put your work out there.