Carphone Warehouse have jiggered about with their tarriffy type things and come up with something pretty special. You pay them £21 per month, you don't pay BT anything (not even line rental apparently) and you get free calls - not only to landlines in the UK but in 28 other countries! - and up to 8MB broadband! And you get a 40GB dowload limit!! Even I couldn't manage to use all that. Probably.
I currently pay BT about £25 for my phone, and freenetname.co.uk £18 plus a per GB fee every time I go over my 5GB allowance. This could save me a fortune!! Of course, the 8MB connection depends how far away from your exchange you are, I think we will still be stuck with 1MB judging by BT's estimating thing on their site.
Apparently the service is available for around 70% of the UK, and I bet Llanfuckwit in the Brecon Beacons is part of the other 30%, but I can dream. Unfortunately the availability checker (which went live this morning) has cracked under the pressure and is currently dead. But I'm going to keep trying!