I love the amazing work that Alex and Genia crank out over at photigy.com. Right now, they have an interesting contest going. They’ve provided the bracketed shots of a beautiful scene in Cancun, your challenge is to make the most amazing HDR that you can achieve from this shared source material. You can submit your work or just check out the fantastic entries on the submission thread.
I submitted two versions to the contest, but this is my favorite one.