As a little follow-up...
Here in Florida, my local dealer who I've done business with in the past said they could order the Ioniq PHEV, but did not have immediate pricing. After a couple of weeks, they came back with the message that ordering would take 6+ months, and they weren't comfortable with doing that.
While waiting on their quote, I e-mailed some other area dealers. The next closest said they didn't carry it because they couldn't service it. The third said simply that no, they could not get the Ioniq PHEV. Another didn't reply (possibly an allergy to my request for an out the door price quote by email, rather than coming in to talk).
Next step - we hit Hyundai's inventory search, putting in zip codes from the closest CARB legislation states to find where Ioniq PHEVs were in stock, and e-mailed them for price quotes where we found the trim and colors we wanted. We also decided to look at a Kia Niro.
Our closest Kia dealer didn't have the Niro PHEV in stock, but there are a handful in Florida. When I talked pricing, the first price quoted was more than $10K over MSRP. Yes, 10K. When I pointed that out, they said there were none in Florida, so they'd have to ship it here which is expensive, and it had a cold weather package installed. After my assurances that there were dealers stocking the PHEV in Florida, and they might be confusing it with the plug-in electic model, they quoted a little more than $1K over MSRP. I wished them a good day and left.
Meanwhile after very few e-mails with little negotiating effort, I had two dealers up North offering Ionic PHEV Limiteds at the very bottom of KBB's price range for out-the-door price. One of the dealers didn't have direct answers to my questions about Florida tax and registration and remotely closing the deal, the other did, with the sales agent assuring me that he regularly deals with interstate sales - but they wanted us to be on site in person to accept the vehicle.
With a stack of airline miles at hand, getting up there would be easy. We'd priced truck shipping the car down to Florida, and considered driving it back. As it turns out, due to good fortune of where Amtrak runs its Auto-train, we could drive about an hour from the dealership, and bring the car and one of us to Central Florida by train for only $344 - compared to $700-$1200 to truck ship the car and another airline ticket to fly home.
On the service front, I e-mailed Hyundai and asked if there would be any problem getting service in non-PHEV stocking states. After a day with no reply, I called - the rep laughed at the idea that service would not be available - pointing out that it must be for people to be able to travel cross country in their cars. He said that any authorized Hyundai service center can service the Ioniq PHEV. On the weekend, I got an e-mail reply saying that since service centers are franchised, I'd need to check with each service center to be sure of what they could do... Well that's crystal clear.
While considering driving a hundred miles to look at PHEV Niros, we got further convinced that we really preferred the Ioniq to the Niro. Our second closest Hyundai dealer followed up by e-mail, trying to steer us to the Hybrids they had in stock, so I asked directly about the service. The rep clarified that since the PHEV is basically the same as the HEV, servicing most of the car would be fine, but for the charge circuits, they had no one that was trained - meaning that service might take a little longer, since they would need to rely on Hyundai's tech line to guide them.
I followed up at our closest dealership, and the sales manager (who had worked with us directly on previous purchases) said that he'd previously sold Plug-In Sonatas (which had only a 2 week when first released) and some of their service techs took the classes for them and of course on the Ioniq HEVs they stock now, so he didn't foresee any problems being able to provide us service on the Ioniq PHEV.
As it turns out, with the holiday weekend coming, we may not be able to take advantage of the train, leaving a drive as the best option, which is looking like it will happen this coming week. It'll cost even less, it just means road trip miles on day one.