yeah, here's the deal with this -
Verizon - need the $4.99/month Mobile Web option. Takes off your monthly minutes. (peak or offpeak)
Sprint - need $15/month Unlimited Vision, plus Handset As Modem option - $40/month for 20MB, $60/month for 40 MB, $80/month for 300 MB (if my memory serves).
These options all suck. The only good thing is - if you have bluetooth - you can eliminate all these cables. Who needs em. Not me.
Good part of this - you can get up to 230kbps ... that's decent, eh?
Oh yeah, and there are instructions on how to do this with Nextel somewhere. I used to do that from Starbucks. Pretty slow but cool.