For the overwhelming number of developers who felt Adobe dropped the ball by not including HTML5 features for Dreamweaver CS5, your concerns have been heard and answered in the form of an expansion pack. The pack is free and available now.
Announced by Adobe at Google IO, this pack provides initial support for HTML5 and CSS3. Here are some of its features:
- Code hinting
- Rendering directly within Dreamweaver
- Previews on a variety of browsers and devices
- Starter layouts
- WebKit engine updates
As is the case with HTML5, these features have not been finalized and will be changing over time.