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!"
Hopes up: wow, four services on one device ! Hopes dashed: all on an itty bitty 2-inch screen ?! Samsung, gimme a 4-inch LCD-VGA-PDA cell phone then I'll be interested. Hopes up ?