From the ASMP site:
In response to member requests, ASMP commissioned attorney Chris Reese to undertake a review of the Terms of Service (TOS) of six social media sites and to prepare findings and recommendations. The sites included in his assessment are Facebook, Photobucket, Flickr, MySpace, YouTube and Twitter. This report presents recommended best practices, considerations, common terms used, and hypothetical situations photographers may face when images are posted on social networking sites.
Take a few moments to read the article. You'll be glad you did.
Thanks again to Leslie at the Burns Auto Parts Blog for the find.