I thought I would post it on my blog, since I found it pretty interesting and it might help us a lot actually.
Imagine, you travel by train everyday, you would need a net connection to browse the internet. For this you would need to go out and buy a wireless connectivity card. Which I think would set you back by another 60 – 70$ in additon to the wireless carriers fee.
Instead go this website http://www.iphone-notes.de/?p=5969
Use google translate to convert the page into english from german. They tell you how you can use the mobile as a modem. Pretty neat stuff.. check it out..