Tried to post this on YouTube, but their video compressor kept dropping the frame rate - the clips looked horribly jumpy, no matter how nice my input file looked. I tried a few different versions of the export, with no luck.
So here it is in QuickTime instead. 25 pixels sitting in a grid, controlled by DMX-512. Runs fine in Firefox under OS X. Let me know if you can't view the file.
Other clips have been posted on YouTube.