HTML5 Animation Tool - Adobe Edge Preview
Motion and Interaction Design for HTML5!
Short description from Adobe:
Edge will be updated regularly to add new functionality, stay ahead of evolving web standards, and incorporate user feedback to provide the best functionality and experience possible. This is an early look at Edge with more capabilities to come.
Flash + Dreamweaver?
I believe that Adobe wants to make Edge as the next generation of Adobe Flash... but it looks cool! Check it out. It's FREE, you can download from Adobe
note: I just downloaded the software and realize you can do really great HTML5 animation from edge. How do I know? Check out the Adobe Edge Preview's Demo Page