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 want to do something like this in my car, get bluetooth wireless headphones connect the cables to the speakers of the headphones to an amp and then to some nice speakers in the car. My pda will play the music sending it by bluetooth to the car, will this work?