Make every hour a happy hour with this excellent rebate offer from Pearl Vodka. You can get $10 back on a 750 ml bottle and $15 back on a 1.75 L bottle through 12/31/09 - and you can do it twice! You do have to fill out the rebate form, send in your receipt and UPC, etc., but I can vouch for the fact that it actually - hic! - works.
A 750 ml bottle costs $20, so that's $10 after the refund for a pretty tasty vodka. They also make some fruity flavored vodkas, so if you're curious about trying pomegranate or blueberry but wary of investing a lot in the experiment, now's your chance to branch out.