This deal has ended.
Update: this has been extended!
Today only, use coupon code WOW to take 90% off dining certificates at Restaurant.com! This is their biggest discount and likely a once-a-year offer so now is the time to stock up. The discount lowers a $25 gift certificate, which sells for either $10 or $15, to just $1 or $1.50 and a $10 certificate, which sells for $4, to just $0.40. Not all restaurants participate, but there is a good selection (18,000+ nationwide) to choose from. Just be sure to read the fine print as many places exclude alcoholic beverages, weekends, and holidays.