Firstly there is a bit of a grey area around when Currys will actually get their stock and how much they will get. I seem to have read in this thread that when the Asus Transformer came out many people that pre-ordered had there cards debited but they were given the run around by Currys due to lack of stock.
Secondly I've decided to stick with the 8GB over the 16GB. I'm not a gamer and have Dropbox and Google Drive, so I think I'll be fine with 8GB.
I changed my order to the 8GB now that USB OTG has been confirmed working, but Google haven't cancelled my old order. The whole system seems pretty poor.
Yeah, I really think Google Wallet is a POS. I used it many years ago when it was first introduced and it messed up my order for one of the first batches of 8800GT's, so I missed out.
Its also messed up my 8GB order by doing multiple authorisations on my card, so I've been charged about £174 for the 8GB. But I still can't see the actual details because its put a hold on the funds but not actually debited my card (which is the right thing to do). I'll have to query this with Google at a later date.
It was a POS then and it still a POS now. Man they really need to get their act together and update it.