I blogged about using 3G to connect to the internet but I used a Macbook Pro running Mac OS X. Getting it to work depends on a lot of factors, with your computer-mobile phone connection as the main factor. Good thing, however, that Mac OS X makes it easy to pair mobile phones via bluetooth super easy.
On Linux, otoh, is a bit tricky. This is one area where Linux really needs to make things more friendlier – just friendlier since the technology and tools are already available, it just needs that extra "person" touch. Good thing I found James Archibald's article on using 3G with Ubuntu Feisty Fawn. At least now we have some sort of a guide on how to make this work on Linux.