UPDATE: You can also just use promo code SHPPRSRSRC and get 80% off (which is the usual $0.80 for a $10 certificate or $3 for a $25 certificate.) Exp: 12/31/10.
Restaurant.com has a new promotion called "Feed it Forward," in which you can apparently give other people $10 Restaurant.com certificates just by providing their email address. You can give up to 40 per day, though only once to each person.
I'm sure there's a catch, though I can't see it from here. Are you consenting to have them spam you? Is there some fine-print restriction that I don't see? If you're feeling brave and want to give it a try, here's some more details and the link.
"Feed It Forward™ is a free way to build community and lift people's spirits by giving the gift of $10 Restaurant.com Gift Certificates. Simply let Restaurant.com know who you want to give to and they'll take care of the rest. You can give up to 40 $10 Restaurant.com Gift Certificates every day through December 31. It's a great holiday gift for everyone on your list. And the best part is - it's FREE!"