Have a read on the forums, although unofficially NTL have stated all customers will be on the 10M service eventually with differing caps, todate the only upgrades appear to be the removal of caps on the 1 and 2M services.
This is a good link btw, but req's alot of reading:-
http://www.cableforum.co.uk/board/sh...ad.php?t=39811