I would say to just stay on top of rumors or Apple oriented blogs. When they get released, word will get out there (and here probably) first. When that happens, just head over to the site and order one online. Either that or run into the nearest store when they open.
The nearest store is about 1.5 hours away from me as well, I'm going to drive over there though and pick it up; it would be nice to spend the day in Jacksonville in starbucks or wherever customizing the machine.