Amazon US now has the following statement on the page for this set:
Don't know what's up with that--my preorder is still pending, and shows a shipping estimate of October 13th.
Could be that the product listing is in error, and that the set will be available through Amazon US but has been delayed. Or, it could be that it will NEVER be available through Amazon US.
In any event, I just ordered one from Amazon UK for roughly the same delivered price as offered by Amazon US, and the UK site has them IN STOCK.
EDIT: About 40 minutes later, and the Amazon UK order is already designated as "shipping soon."