Hmm... the most reliable USA one that i know of would be http://absurdlycool.com/?USA=1&mode=lim
It basically tells you that the manufacturer is giving away freebies, and gives you a direct link usually to the manufacturer's site.
Always be careful, and to be sure just check the comments.
ALWAYS USE ANOTHER EMAIL!
I rarely use that site, as it contains few Canadian freebies
EDIT: hey, after reading the rules more carefully this time, is this the best forum to post freebies in? I'm not sure if this is a deal or not, (MOD:if this might be better in a different section, please move it) thanks