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.
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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.