They shouldnt be attempting to charge people for data they have already paid for, they are simply insulting everyones intelligence with this £15 a month tethering cost. What a joke, there is very little difference between the data consumed from browsing on an iPhone or webpage… a couple of flash videos is the difference really, and it shouldn’t matter when you are playing for unlimited data anyway. I’ve been using the HWbrowser in the app store to download lots of stuff to my iPhone.. we’re talking 200mb a day.. thats way over their 1GB usage limit and they haven’t contacted me at all. So I doubt they are going to start hunting down users who use tethering to watch the occasional youtube video or view the occasional flash video.. Lets get real here, they are just attempting to scare peoplke and thats it.