After several hours fighting with CS5, here's a similar series of bracketed photos, churned through the built in HDR Pro. I still have a lot to figure out, and I need to pick up the pace (this is very time intensive). But even from just doing three of these, I think the result is already noticeably better.
So here's the result of my first meddling with HDR. This top one looks much less natural to me, but of course, that's not a required attribute of HDR. If anyone wants to way in on their preference, just comment on whether you like the top or bottom (or neither) photo better. For a little perspective, there's a single shot in the previous post of basically the same thing. Some may prefer that.