Hmm... Might put in an order just in case Amazon decides to slap some credit on it, but it's so close to the release date that it might not be worth the effort.
[quote name='GHmanRON']Never played a hitman game before, so should I play the other ones if I wanna play this one, so I can understand the story?[/QUOTE]If Absolution looks like your cup of tea, then definitely try Blood Money if you're able to get your hands on it for a reasonable price. A used 360 copy could run you $25+ (there's a demo on XBL, actually), but if you have a decent PC then definitely try to get Hitman 2: Silent Assassin and Blood Money as they are arguably the best entries in the franchise. However as for story, I don't think you'd be lost. Having a grasp on the gameplay and stealth mechanics is going to be really nice going into this game, though.
Something else to consider: there's also a Hitman HD Collection for PS3 and 360 coming out sometime in the future. The release was supposedly delayed from October 15th to January 1st, which is a shame since it would've been perfect timing for just about anyone trying to get into the series before Absolution.