I am checking out Adobe Edge, the new authoring tool from Adobe to address the need for a HTML5, CSS3 creation tool.
Seems quite a bit like the Flash interface, so good news if you know Flash and bad if you hate it. I hope it is an improvement over Flash CS5.
Right now Edge is free and there is a ton of learning materials available.
Here’s the link:
P.S. Also don’t forget to get the HTML5 addition to Dreamweaver.