Oops, completely misread your post. I guess that's not so bad, but it's still a concern - I'm worried about remembering to go on wifi when at home.
You may have a point about the FUP being a target, but what I particularly like about it with T-Mobile (and I think it's the same with o2) is that if you go over it, they contact you and ask you not to continue. With Orange, it's not a FUP it's just a pre-paid allowance and breaching that = mucho dinero. Wednesday is the day I'm allowed to upgrade so I'll be haggling a lot, I just really don't like the idea of having a lovely fancy internet phone and being concerned where and when I can use it.
I guess I really wouldn't be so concerned if it weren't for the other two networks being so much better for data. I've seen a lovely deal for a sim-free Hero with a t-mob contract on Expansys that I might go for if Orange refuse to play ball.