Great links for writers who want to avoid being scammed...
SFWA's Writer Beware site
---This is one of the first ones aspiring authors should visit, just to avoid being scammed. The SFWA
site has some great articles in its public areas as well.
Preditors & Editors
---Before you send me e-mails, please not that "Preditors" is intentionally misspelled. :-> This is a good site to look up a publisher or agent to make sure you're not getting a notorious scam artist. However, not all bad ones are listed here, and some bad ones are listed without a "black mark" because they don't have that information yet. (Actually, the marks are red, but you know what I mean...)