I had the idea of making a stick animation program sort of like Pivot, except it would create a SWF instead of a GIF. I would appreciate any information about the SWF file format and how to create those files. I have some experience with assembly programming, so I can probably deal with the bytecode.

If that's not possible, I could probably have it output ActionScript to paste into Flash, but then you would also need Flash, and it's kind of messy. Any suggestions?