To the OP, can't you just wait for the UK launch? It's only 11 days after all!
You will also need a UK plug adaptor.
Is the US charger both 110 and 240v?
Do I just need to buy one of those shaving 2 pin adaptors for it to work?
Yeah it is a bit more expensive here than the US but you have to bear in mind that the US don't pay VAT, they pay sales tax, which I'm pretty sure is only 10%. Having said that, if you convert the US price into pounds sterling and then add VAT it comes out to £406 so we are still paying a £23 premium, but then you have to factor in shipping costs, warehouse and distributor costs etc, so I think the price is pretty fair. Much fairer than the prices some other companies charge for their products here compared to the US!

maybe but work it out , apple has already paid distrubution cost etc in the us or the us one , and for a fair comparison you would need to remove the us sale tax at 10% before adding out 17.5 , so really we should just be paing 7.5 more , also the shippings costd to me is a crap area , as there all made in china so they could ship direct for china to the uk and save on shipping costs to the us
US prices don't include sales tax as it varies state to state, so adding VAT on top of the US price is almost exactly right for a like for like comparison.
If you are already going to fork out £620, surely an extra £70 for the warranty piece of mind and not having to pay overseas shipping isn't too much of an issue?
The 64GB Wi-Fi + 3G is £623.05 on the current rate.
That's a good £75 off, so providing the market doesn't dive again (yay for elections, Greece etc) then I'd still say to go for it.