I've not got any activation screen whatsoever, just "iPhone" and "Accessing iTunes Store..." in the bar at the top. It's been "nearly done" for the last 10 minutes.
Makes you feel any better I'm a new customer and I'm in the 3rd hour.
2 Calls to O2. The last one I spoke to a really rude guy at the activation desk. He was no helpful and in the end said call customer care. I did, sat on the line and then was told to call the activation line.
It's not like they didn't know this was going to happen. They knew damn well it would be hammered and yet they neglected to take the necessary steps to upgrade servers etc....