I read something interesting last night and I figured I would pass it on.
There are 3 main sites for online taxes. All three are about $10-25 I believe(Including the state eFile). TaxACT, TurboTAX, and H&R Block. If you have a simple return, some people have put in their taxes on all three programs and ended up where one program gave them significantly more money. Since none of them charge until you file, you could theoretically save several hundred dollars(maybe).
Also check out
www.slickdeals.net for some ways to save. They have some deals posted work looking for.