I'm not sure if anyone has thought of this but what's stopping you from purchasing a laptop internet card and poping your iPhone 3G sim into it? Would you get internet? (w/ no voice of course lol)
..just thought of this idea today. Or if it's possible "clone your sim" and turn your phone off.. maybe I'm just crazy.
Also want to add:
GT Ultra Express Card ($199-299)
The Option GT Ultra Express provides enhanced mobile broadband performance for quick easy access to email, the internet, and business apps on your laptop while on-the-go. The GT Ultra Express operates seamlessly across AT&T's 3G BroadbandConnect and EDGE networks providing you the perfect combination of performance and coverage. And with quad-band GSM support, you can stay connected whether traveling across town or halfway around the world. Designed to work with newer laptops with slots, it has a convenient flip antenna that will keep you connected wherever business takes you.
Included Features:
Work seamlessly between AT&T's 3G and EDGE networks
Access email, internet and business applications while on-the-go
Global compatibility with the world standard for wireless - GSM
Throughput up to twice as fast as previously available*
Quad-band GSM/GPRS/EDGE, tri-band UMTS/HSDPA/HSUPA
Expected HSDPA download speeds of 600 Kbps - 1.4 Mbps*
Expected HSDPA upload speeds of 500-800 Kbps*
Expected EDGE download speeds of 70-135 Kbps*
Flip-up antenna for optimal mobile broadband performance
OS support for Microsoft® Windows 2000, XP, Vista®
Compatible with Apple® Mac® OS X (version 10.4 or later)
Plug-and-play compatibility with AT&T Communication Manager software
Designed to work in newer laptops with ExpressCard slots
* Actual throughput speed varies depending on network
...to me I think this would work!
