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!"
Wow! I used to wonder if something like this would ever be done back in the early 90s. I used to have driver's remorse whenever I'd park at the Mall or other parking lots only to find a parking spot that was closer to the exit. I used to fantasize about my car having KITT abilities where I could call it up to park in that spot. I somehow think we're getting ever so close to that.