mark22, worst case scenario, Orange are offering the phone to new customers for £49.99, if O2 don't at least match that, tell them to sort out your PAC code
I haven't had that much time to play with the phone yet, but I have managed to connect wirelessly to my home network which is rather handy. Can check my e-mail and browse the web on my phone using my broadband.
Here's a little write up and some pics if you want to take a look.