I've noticed that you can be charged for the mobile.o2.co.uk and wap.o2.co.uk address use.
However all the blackberry.net access is billed FREE. You need to make sure you use BB Browser in Internet Browser mode. Not the O2 mode.
However..... what are the username and password details for blackberry.net on O2(UK).
I'm trying to use my data connection on my phone to get internet on my MacBook...