It really is annoying that this is sold in Europe and Asia now, but not yet in the US. Would be early adopters have to resort to buying abroad at this time.
Olympus UK will have a 20% VAT tax added on, plus Express shipping of $50-75 to the USA. You may be able to talk them out of the VAT. They may decline to take your order, protecting the US dealer network -- I don't know. Another poster mentioned a shop in the Netherlands, as I recall.
I've checked several shops in Asia and they are all back ordered, so this is looking like a home run for Olympus but a strike out for US buyers.
If you can wait a month, they should be available in the US. Otherwise you are going to have to pay quite a premium and have a long shipping delay too.