> .fla / XFL import — This is the one I’m most proud of. You can open your old Flash files. As far as I know, this is the only open-source tool that functions as a full authoring environment and can actually import .fla files. Not just play them back — edit them.

The backwards compatibility here is pretty clutch. I agree -- if he can build something that is compatible with old files AND pushes things forward for new, then this could do some really awesome stuff.