I use this daily.
http://www.t-mobile.com/products/overview....46167&class=pda
However, to be truthful, the best deal is to get a Verizon High Speed Cellular card, for 90 bucks a month, you get speeds up 400kbps.
It's worth it, imho.
http://www.verizonwireless.com/b2c/mobileo...=nationalAccess