i would agree it seems odd, and disappointing. I filled out the online order form, and as you mention USD is an available currency option on the web site. In the field where one's address is filled in, there is a drop down menu with a huge list of countries. "United States Minor Outlying Islands" is included in the list, but not the United States itself. I emailed Lumigon to ask about it and received a response to one of two emails I sent to two different email addresses on the Lumigon web page. The response was that the do not ship to the US. Seems very strange they would ship to US outlying islands but not the US itself.