you used to be able to do it with any WAP enabled phone and they are cheap now but you will pay for the access itself, depending on your contract. I presume you still can use them, though I upgraded.
If you want to access the internet more widely then a smartphone is probably better but will set you back around £200 min I think (more if you go for a higher spec one) or look for something that is free on a contract. The key then is a contract with unlimited web access included of course.
so it depends what you want. you seem to be able to get Blackberries quite cheaply on such a contract now (£15 a month)
you used to be able to do it with any WAP enabled phone and they are cheap now but you will pay for the access itself, depending on your contract. I presume you still can use them, though I upgraded. If you want to access the internet more widely the