I know better than to have expectations. I did swirl this bit of info around quite a bit yesterday - today I'm back to shoulder shrugging.
In addition to everything else - I doubt that STBX is entirley logical right now - he may have the vague idea that he'll see the kids more by working closer to them but not necessarily living closer to them (He's made a few decisions since BD about practical matters that are wildly irrational). And it could very well be a financial decision. His current county is one of the lowest paying in the state.
That being said - it is the first sign of moving away from his inertia, and he did chose to notify me of this well before he needed to (the application process for these agencies is always months long) - so I'm going to do my best to up the friendliness a bit when I do see him - and monitor results. Couldn't hurt.