Well, fixed for now anyway.
Like I said before, I still suspect that it could be more than a bulb issue - but I'm willing to play along for now. It is very possible that is all the issue was, but based on some of the reading I mentioned in the other post (and the fact that there was essentially a TSB for it), I have some reservations.
In any case, the problem is fixed for now. It didn't cost me any money. And I had my car back in under an hour. Can't really complain too much about that.