Locally, my ISP offer an interesting-looking business service that goes over a radio link rather than down the phone line. It's listed on their website at about £5,000 a year for 2Mb both ways at 1:1 contention. Although they're very niche at present, things like this can only be good for the broadband market in the long run because they give a few more options that don't involve that string of copper owned by BT and will work in rural areas.
Decent ISP for bog-standard ADSL, by the way - when you phone up, you get straight through to the bloke who pushes the buttons to change your service and stuff, no call centre gatekeepers in the way.