I had played around with High Dynamic Range photo manipulation a bit quite a while ago.
I was using Photomatix Pro and while the results were interesting I found them a bit gimmicky.
A few weeks ago I came across a reference to Trey Ratcliff's site stuckincustoms which made me aware of the updated version of Photomatix Pro.
This version is much easier to use and is capable of much subtler results than I was able to achieve with the version I had.
So I have been playing around with HDR and really enjoying the results.