The first keynote just finished; I have seen a lot of new stuff:
- Office 12: much improved interface
- Linq: quering both database and Xml-datasources without using OleDbCommands.
- Superfetch in Vista: optimizing memory-usage and systemperformance without user intervention. Plugging in an USB-key will make Windows use the available memory as it were regular RAM
- Atlas / AJAX-support in ASP.NET
More details and links to follow.
Edit: link to Linq