If he's showing all these cool features in whidbey asp.net, I will be at ScottGu's talk. Skipping all these other talks.

Some highlights:

• Url Rewriting using the new UrlMapping Service.  Build vanity urls on your site (/products/shoes.aspx is re-written to really be processed by /products/productcatalog.aspx?id=shoes -- but the customer never knows it).  Talk about how this makes http.sys kernel level caching possible for dynamic pages.
• Using ValidationGroups.  You can now have validator controls optionally validate depending on which button on the page is pushed.  You can group validation rules into “groups“ so that all controls within that group fire or don't fire.

• Building workflow on a page using the new asp:Wizard control.  Handle next/back, step1->n workflows easily now (no funky state management tricks for controls required).