I think it's a fantastic idea. Like a few posted, get to the point with the marketing. It's only later that I understood what it does.

I'd take one of the more advanced gif, that showed highlights, code coming in, file changing, and I'd make that prominent at the top of the page, next to the tagline or marketing spiel.

Remember the What is it, Why do I need it (and is it for me), as people come in and have no idea what it is!