There are tons of resturants that giveaway freebies for birthdays! But many of them will also send you coupons on the day that you sign up and your anniversary. If you decide to sign up for lots of these you may want to put your birthday down as different dates for different places so that you are not bombarded with freebies that you have to use all at once. =)
This list was put together by Goob over at 'Hey It's Free' ,one of my personal favorite freebie sites.