Three shot exposure (-3,0,+3) and then processed in photomatix pro 5. I bought the software but you can use it freely but it will leave a watermark till you purchase it. Fun software and I try to be careful to not over exaggerate the image. There are many presets and you also have full control. There are a few fun websites that I enjoy like Trey Ratcliff and toursdepartingdaily that use this software. You can also get a discount around 25% by using certain codes.
Thanks for the kind comment on the image. It was from Martha's Vineyard a few weeks ago.