I've done my bit and let BT know I'm interested in broadband in my area (Claverdon - just outside Warwick, c'mon guys, let's get ADSL!!)
I don't think there's much else I can do, short of marching thru the village asking ppl to register...
Of course a thread like this will increase peoples awareness - good one FE.
If you want to register your interest...
Go to BT Broadband site
click on 'take me to BT broadband'
Then check if you're number is ADSL enabled, if not you can register.
Hope this will help.