Just found this great deal @ buy.com: DualShock 3 (the new one w/ rumble) controller for PS3 for $35 w/ google check out for first time buyers or $45 w/o. I'm not sure how long this will last but I just couldn't pass up saving some $.

For those who are not familiar w/ google check out it's a service that you buy through somewhat like paypal. Google stores all your private data and allows you to buy from different sellers without sharing your information. Oh, and with buy.com they offer an additional $10 off the current sale price of $45 if you sign up.

Thanks to my friends @ cheapassgamer for the initial find.