So, finally, we are all agreed: if you want a blindingly fast ADSL2+ connection, at an excellent price, with customer support that is as good as ANY ISP in the UK (check Thinkbroadband customer feedback), no traffic limits, and no traffic shaping, then go...O2/Be.
Glad that's all over.
Nomadd
EDIT: ...and if you are unfortunate enough to use an exchange that hasn't yet been enabled for O2/Be yet, think of using Zen in the interim.