Thanks for the suggestions Steve. Yeah, a save XML would be nice and backwards step... I'm not sure what you mean, but only because its ages since I used this myself.
In fact, I'd love to be able to let you edit frames by dragging around the points of the skeleton and various other things: scaling the whole set of angles, etc. But even what I was thinking of is actually producing the whole walkcycle dynamically in-game and letting the user script up commands to make an arm stretch out or up and so on, and to automatically foreshorten and so on. The front/back walkcycles are pretty dodgy when actually used in AGS, and I want to work on that too.
Perhaps I can build up some momentum to work on this some more. It would be great if I coudl work out how to do it nicely in 800x600 mode, as its all very small just now.