I got myself and N70 on O2. I can say it is a very good phone but slow when you want to go to the messaging or gallery. I does speed up if you go to these sections quite often, I dont know if it has it in a cache of some sort but if you dont use it for a while then I will take some time to load certain sections.Hope you get what I mean.?
The camera is of good quality and has good mp3 playback. The video is good aswell very smooth and clear but like other phones if you move the camera around fast it can get pixelated and blurry.
Plenty of options like organiser etc as you would have expected from todays standard in phones. Video calls are good. I have had a few with my mate. Voice calls are clear with out any audible crackle or loss of signal (might be Service Provider dependant).
All in all I recomend this phone. Probably one of the best out at the moment. I find the battery life is good unlike what Gravity mentioned in his post. I have had my phone on for over 7 days, with Bluetooth consistantly on and still had 3 levels of power left when I decided to charge it.
Hope this helps you decide.. If you have any more questions let me know.