Since this seems to be the topic du jour around here...I just went to sign up for Grocerycoupons.com to see how I liked the service, but decided not to go through with the registration because there was a $10 registration fee. Well at that point I had already given them my email address, so a couple of hours later, they emailed me to offer a free membership.
So...if you're looking for a clipping site like this, but don't want to pay up front, give it a try. Go to the page to sign up, put in your email address, but then close it out before you put in payment info. You'll still have to pay for some coupons, but at least you avoid the registration fee.
And now I am done with my PSAs for the day.