You might like Svija — you can easily animate SVGs using Illustrator. It's not as powerful yet as Flash, but that's our goal. Disclaimer, I made it ;-)
I must admit, this isn't the most inspiring landing page for someone like me, who could be your exact target demographic (long-time Illy user and someone who likes to tinker with new web tools). I don't really 'get it' and (this is entirely personal) the design looks quite dated.
I'll bookmark it, share it and keep an eye on it though - Good luck!