I didn't see another post on this unless I missed it, but Ebates now has a $1 rebate for tickets purchased if you go through their site ... not a ton of money, but it can add up! I've used Ebates a ton and they have been very reliable (just got a check from them today as a matter of fact).

If you're not a member, you can sign up here (that's a referral link, if you don't want to use a referral link, just go to ebates.com).