Just a heads up that Woot.com is selling the Xbox 360 60GB pack today for $47.99 + $5 shipping. This is the original style Xbox 360 harddrive, but it is possible to break the drive out of the case in order to use in a slim if you're willing to do that. In addition to the harddrive, it has a 3 month Live Gold card, wired headset, and ethernet cable. A decent price if you need a harddrive for your Xbox 360 anyway.
http://www.woot.com/
http://www.woot.com/