Yeah, I'm hoping I can use a lens or two and spin a few mirrors and get away with that, basically doing a poor-man's raster scan. The arduino could easily handle the timing, the phosphor retention once dry is quite long, if you wanted to, you could take the better part of a minute to draw a video frame and the phosphor would still be working for you if you hit it at close range with UV. When I said "SSTV", I meant SLOW scan. I know there's got to be a few HAM guys here, and probably a few have SSTV stuff on a shelf.
People I think likely have SSTV equipment on a shelf: Cr0sh, Grumpy Mike, Westfw.. a few others.
I may even build the world's ghetto-est Oscilloscope. In fact, I think that's kinda a stepping stone, anyway... that's just a single scan line. Using a couple of motors, I may just be able to drag the LED around on the glass for a totally hackjob solution.