Let the hive mind of Engadget get that for you.
"I just switched to Sprint from Verizon about three months ago for the Pre. Then I went for the Hero about a week ago. Now, I miss my hardware keyboard and am thinking about switching to the Moment. I am still able to switch back to Verizon if I want and get the Droid when it arrives. Should I just trade up to the Moment when it comes out, see if I like it, and if not switch to the Droid? Or something else entirely? Help!"
O2 is by far the least advanced network in the UK so, iPhone or not, it's good for their customers that they're installing it.
The timing fits the expected iPhone launch plans for Europe so it certainly adds credence to the 'O2 for the UK' rumours. Looks like we're not getting a 3G phone then!
Just out of interest, why would you say that O2 was the least advanced network? I thought that their support for various features and standards was quite good. Who would be the most advanced in your opinion and why? Not saying you're wrong, just asking really!