my Vodafone mobile phone includes Interenet access, with a USB cable. I think they charge me 56p per day, just for the days I use it. They tried to sell me an internet-inclusive contract, but I didn't want it.
I am on it now as away from home. It claims a speed of 115kbps and is quick enough for DIYnot, ebay, mail and stuff. "Actual" was 92 kbps just now on a file I downloaded. Seems OK. One prob is that it can receive mail OK, and can send mail on virgin.net addresses, but can't send on ntlworld.com addresses. I can't see why not.
I tried using the phone itself on the net or email but the screen and keyboard are too small to be any use.