Let the hive mind of Engadget get that for you.
"As someone who doesn't reside in the USA, I was wondering what would be the best way to get internet for my computer in the US for a couple of weeks? If it were Europe I know I'd look for some prepaid data. Is there anything similar offered by American carriers? A MiFi or a data SIM that I can tether from would work, but I'm trying to maintain a tight budget. Help!"
Alternatives:
Asrock ION330 with XBMC Live or Ubuntu XBMC version (linux version, so you can enable VDPAU) on it and if you don't mind the lack of wifi, there is ultimate HTPC - powerful, nice UI, not very expensive, Blu-ray option.