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!"
Why on earth would something like this need FeliCa? I thought that FeliCa is for subway passes and stuff like that- I can't imagine waving a whole laptop over the FeliCa reader if I take the subway.