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!"
I got mine off ebay.COM for $200 for the value pack. cost me £120 incl p&p and no import. I see so many on the tube with them! I really think its going to get to the point where everyone who wants one has one by September for sure!!