Hi Don, offering a USD option is already on the list to see if we can make it work, next week. It's not as simple as adding a button unfortunately, we've got to look to see if our accountancy package can accept a third currency and still work OK, and we need to make sure it's financially viable with our processors (Amazon won't be a problem though).
Regarding US fulfilment - it has been considered at length (a couple of months) ago, but for a multitude of reasons we won't be doing it this time. The main one for the moment is that our prices to the 'big 4' outside of Europe - US, Canada, NZ & Australia - are already pretty good and we're working with Royal Mail to get them down a little further in time for the pre-release. We'll see.
Thanks for your feedback.