It turns out that thethering is pretty popular in the UK since the BB sticks did not take off as well as over here. So, you can get a better deal thetering. See below.
@ Wossname, lets be honest neither the customer (mostly) or the networks tend to have a clue what they are doing. Mobile networks push data like crazy to consumers but fail to notice applications like eBuddy which would generate even more revenue if preinstalled.
The operators know about those things all too well, they just don't care very much.