I tried a program from Alien Skin Software called Bokeh 2 to get this effect. You can do several modifications and tweaks with the software, it seems like it is a pretty comprehensive tool. With more blurring and contrast I probably could have simulated a tilt-shift lens more and ended up with a miniature looking shot, but I just wanted it blurred enough to cover up the "bad" portion of the photo. I am pretty pleased with the result, and might consider adding Bokeh 2 to my collection of software.
As always, feel free to leave any comments or feedback, and remember that clicking on the image takes you to my online gallery hosted at smugmug, in which you can view this (and all of my photos) in various sizes. Thanks for stopping by!
Enola Gay (tweaked using Bokeh 2)