Update:
So I finally did accept a non-TT, continuing Instructor position at a SLAC due to my fears of not being able to get hired ever again with a 5-year gap in teaching. After which, my SO's department declared that hu can't leave for next year - though hu has fulfilled the residency requirement and only has data collection and analysis left on the dissertation.
Off I go with our 2-year-old son and cat to another state, wondering just how much more I'll be asked to sacrifice for hu's PhD...
Also, hu has very good possibility to be hired for Fall 09 at R1 near SLAC I'll be teaching at - as in they have already asked hu to interview, but hu still keeps talking about other jobs hu is interested in around the country. Even at schools where my type of department doesn't even exist! I'm left wondering why he thinks it's ok to make me the trailing spouse at another university when we could both have jobs that we earned on our own rights.
Sigh.
If you are going to do the hu silliness, at least be consistent. :o)
If you are wondering what he thinks, then it's definitely time you asked him. Y'all must talk about these things. Otherwise, your marriage or partnership could be doomed.
He may think he should get the best job possible at the best school possible, as that is the normal thing to do after a PhD in one of those high demand low supply fields (yes, I'm in one, possibly the same one your SO is in). If that one doesn't work out or isn't a good fit, then the chances are SO will have done enough research in that environment to make it easy to slide down the academic ladder a notch to find the next school with a better fit. Certainly, he's been taught in his PhD program that he should go to the top school that will hire him (and he's heard this over and over again).
Your prior willingness to give up your TT career completely for him to get a PhD is further evidence to him that his career is more important. Perhaps the known disparity in earning potential is also further evidence to him that his career is more important. He might also be thinking that since y'all have sacrificed so much for him to earn this PhD, he should be getting the best job (paying and potential) possible to make up for that.
If you think differently, you need to speak up NOW. Y'all must talk about these things! You should have been talking about them all along, of course. Don't wait any longer. You both need to know exactly what each other is thinking and wanting so that y'all can make good decisions
together about what to do next.
If this doesn't workout things pretty easily and in a timely manner, do what zharkov says.