[Bossman]

I am assuming you are talking about general surfing while tethered using your laptop right? If so, I can tell you that it eats up a lot of data. I tether on the way to/from work on most days, and during the 1 hr. or so, I average about 14 - 17 Mb. Obviously, it will all depend on what pages are visited.

I definitely will not tether on any prepaid unless there is a bundle data plan or it's unlimited. Or if it's so ridiculously cheap! I will just stick with using the smartphone. The opera/opera mini browsers makes the experience a whole lot better, and definitely cheaper.