I've known for a while that NTL are speeding up their connections this summer 150k to 300k, 600k to 750k and 1M to 1.5M. It was only after flicking through the July issue of .NET that I stumbled across another upgrade. The article describes a turbo button that lets the user (for a fee) speed up their connection to 1M to 2M for a certain time. It sounds an intersting idea, for those who might need to get a new linux distribution downloaded a little quicker.
My thoughts are that for normal p2p filesharing it wont be worth it. Sure your connection will be faster but you are always limited by the rate the person you are downloading from is uploading. I'll be waiting for the press release before I really make up my mind wether it's a good idea.