According to their Twitter the price plans will be available tonight (even though i'm posting at 2100) at:
o2.co.uk/iphone
Few rumours/stories- I don't know whether there is any turth behind them or not..
'Every o2 customer needs to pay to end their contract if they want to upgrade early i'm afraid'
'The tariff prices will stay the same'
'You can definitely upgrade, if you'd like the 3GS you'll be able to pick one up June 19th'
'Full prices will appear on our website later on tonight'
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guys-
i will update with more info as and when i get it