My K-7 arrived from NewEgg today! Whoo!
I got nervous when I opened it and instead of a warranty card, it had a serial number card that specifically said that it was
not a warranty card. There was an international warranty service locater paper inside with USA stuff, and it had the rebate info for other lenses (unfortunately I have the only ones I'm interested in on the list already!) so it is definitely a USA one, not grey market.
Before tearing open the rest of it, I called Pentax and they assured me that yes, I will have the full 3-year warranty. They suggested emailing them the serial number, contact info, and receipt to
pentaxinfo@pentax.com to make sure they have a record of it, which I will do tonight.
In the meantime, the battery is charging.