I have this D-link 7-port USB hub. Been using it for about 3 years now with nary a problem. Actually now that I think about I may have three, one at work, one on my home PC, and one on hte the HTPC. Hrmm...
About $25 from newegg.
http://www.newegg.com/Product/Product.aspx?Item=N82E16817111402