I was looking around shopping for case fans when I came up on a deal on Newegg for these decently quiet case fans. If you buy 10 you get them for 99cents each and its free shipping. That is a heck of a deal to help cool your systems and heck they make great computer geek stocking stuffers. ;)
here's the link:

http://www.newegg.com/Product/Product.asp?Item=N82E16835150007