My office at AboutUs overlooked the railroad tracks. Many meetings were interrupted. I set out to take pictures of them, their full length, as they rolled by.
Locomotives speed by. In slit scan photos things moving are sharp while things holding still are blurred.
I've called the program smear-store.qtz which is hard to remember. I've wasted many minutes hunting for it.
Quartz doesn't natively write files. I found a plugin that let me save smears in reasonably sized jpeg files.
I've found the program was better at spontaneous entertainment for kids of all ages. I never got a train picture that made me happy. But I've had fun trying.
Traffic in Beaverton captured in a sequence of images then flowed on many rows of a web page.
Wayne Downer and I drove the scanner around Beaverton hooked to his high-end video camera. The stabilization wasn't good enough to save in-motion captures. But "stills" were interesting. webpage 
I met Andrew Davidhazy at a design conference in Portland. He had a DIY scanner hacked into the focal plane of an aging SLR camera. A nice extra was his stand-on rotating platform and a photo-quality printer with which he printed 360 degree views of attendees. webpage
Davidhazy's scan stands in for me on the Photobot. See Photobot Takes and Shares Photos
I met Jay Mark Johnson at a show in Santa Monica. I'd seen one of his images displayed in the Linus Bikes' Venice Beach showroom. The mechanic mentioned that Jay was a local and that I should watch for him.
Jay's prints were huge. He explained that he used a flatbed scanner detector. On close examination one could see chroma speckles from rgb detector offsets capturing moving images. webpage
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Linus Bikes' showroom has moved. post