Adobe has introduced a technology preview of the Adobe Dreamweaver CS5 HTML5 Pack extension.

This extension offers initial support for HTML5 and CSS3 in Adobe Dreamweaver CS5. It helps you create HTML5 pages and CSS3 styles in a simple way. It also includes updates and WebKit improvements for Design View and Live View rendering.

Here is a list of the enhancements made to Dreamweaver CS5:

1. Provides a multi-screen preview panel, permitting Live View display on 3 different screen sizes, with Media Query support.
2. Appends code hinting for the HTML5 Tag Library with fresh tags, attributes, and properties.
3. Updates code hinting for new attributes and values in existing HTML tags.
4. Updates Live View to support <video> and <audio>.
5. Enhanced rendering for CSS3 in Live View.
6. Adds HTML5 basic layouts to the New Document Dialog box.

Click here for a detailed read.