I'm fan of Photomatix. I believe that it is a program of many resources. I believe that you have used here it very well. I like the oblong composition!
LightningPaul: I discovered the program two months ago. I really love it to get/make nice contrasts in pictures which humans also see and experience. Sometimes I use it for more artistic reasons, though I mostly try to obtain a natural looking image. I have posted more HDR images on my blog and soon you may expect more of them. Thanks for the comment.
I've never used photomatix, but one of these days I think I shall have to have a go. I really like the warm summery glow you have here, it goes really well with the playfulness of the image.
LightningPaul: It's a nice program with lots of possibilities. Though many options, which nobody can really explain. Just spend a few days experimenting and you'll feel what the controls may do to your image. Thanks for the comment.