Pre-paid Internet Over GSM?

[Yossarian22]

I realize we live in a modern time of $90/month phone bills, very sophisticated smartphones, and things of such a complex nature.

I was wondering if anyone knew anything about pre-paid Internet over GSM.

GRPS
EDGE

Anything that will give me pre-paid wireless?

Also, if anyone was willing to school me on the technologies, I'd be happy to listen and learn.
I ask because I'm getting a 900/1800/1900 BenQ USB GSM Modem and curious on how to get internet access where wifi is spotty.