[xmind2006]

I use SPB's GPRS monitor and like the simplicity of it and can see the data on the today screen.

I can definetly see where you can transfer over a couple of gigs in a month if you had a plan that allowed it. It really doesn't take a lot of effort if you constantly stream music, video, or TV....but you'd probably have to be plugged into a charger for at least half of the month though....