From PDC
Here some innovations:
Reviewed classes hierachy of the page by using partial classes (innovation of the new framework).
FrontPage Extension no more necessary.
No more necessary to compile all in a single DLL
HTML editing improved with full control on witch would auto format
Intellisense on all supported files: inline, HTML, xml, web.config, css...
Full XHTML support (Finally!!! :-))
Improved visual design of tables
Integrated Web server (IIS is no more indispensable for local pages)
Debugging of aspx page (when doesn't use code-behind)
Publication with new dialogs in order to choose files to publish
Simplified design of data access
Master pages (analogous of winforms visual inheritance) that it allows a better separation of jobs between diagram and code developer
Better usability for authentication mechanisms
Automatic website personalization (my.yahoo.com style) by using the user control.