Doug - I did the heat test today and got interesting results. After driving for maybe 20 minutes at highway speed, I pulled over at a truck weigh scale. I quickly felt the outer part of the hub assembly. The DS was cool but I could feel the PS side as being a little warm.
If the rotor was causing the heating (after stopping) you would think both sides would heat the same.
I wonder if I should recheck this side and possibly loosen it up a bit.
Do this test a few more times before making any changes, unless you have obvious looseness. It's worth noting that a loose bearing can also run hotter just as a tight bearing can. Also, if you wanted to get anal about this heat testing (and I know you do..), just pull off the side of the freeway. Even the time it took you to get into a truck stop, etc can allow things to heat up differently if you have a caliper hanging up (right right side calipers tend to hang up first when they age, btw)......
Anyhow, check this a few times and consider the brake issue before making any changes. You might borrow a friend's infra red temperature gun for a few days. I have the feeling you're going to have a hotter rotor, which will point directly at a caliper starting to hang a bit. Not a problem, but some day a rebuild might be in your future.
If its not a heating caliper then it may point to a loose bearing(s).
I've had PS reaccuring loose bearings on one side that I would tighten back up after getting loose (every few months). Just recently did a front axle service/repack. Turned out my bearings were 'knackered' i.e. loose and not seating properly (when replaced b4 some bozzo (yours truely) put in new bearings but left the old race -dud!) - hence the reason they kept getting loose. That effect also induced some spindle wear.