Stayed up until 1am last night in case they came online, no luck. Checked when I got up, still nothing. Seemed to all kick off about 8am (suppose that makes sense, midnight Pacific Time).
Had the same server errors and cart emptying as Paul. Was going for a N4 16GB and N10 32GB, but after the shambles tried the N4 alone, after a lot of reloading finally got the Google Wallet popup. Clicked accept and it showed a spinner, then that disappeared and I was looking at the Google Wallet popup again. Looking at my account i could see the money had been authorised (the available/actual balance difference) but no confirmation page or anything in Google Wallet. So called support for a shout, answered straight away, and first guy said a lot of people were having issues. No s***! He put me through to the Wallet team but they had a massive queue. While on hold the transaction finally appeared in Wallet as "pending". And I've just this second got a confirmation/receipt email for the N4 16GB. Estimated shipping 15th November. £9.99 for "2 day" shipping too. Grr.
All a bit of a mess really, put me off getting the N10 32GB (which is now showing coming soon too)