That's pretty nifty!
It's got me wondering about combing an actual motion blured photo with a still from the same location!
This is a great idea, and a great development on the previous idea!
Oddly enough I was trying to do something similar on Saturday. I wondered if I could do a long exposure for the blurred bit and then use flash to get some sharper detail, but it didn't work. I have CS5, but I haven't explored the filters at all. A job for tonight I think