This morning, O2 (seemingly) inadvertently published pricing for the Pay-As-You-Go iPhone 3G, then quickly retracted it. Eagle-eyed sites gleaned that the 8GB iPhone 3G will cost £299.99, while the 16GB model will cost £359.99. Included with that is six months of Wi-Fi and unlimited Internet access, after which users would need to top up a minimum of £10 per month to keep the Internet access active...