This code-heavy session showed techniques for enhancing user assistance, such as sliding, fading, and expanding/collapsing text, pulling content from a database or another file, offering link previews, and allowing users to annotate, customize, and rate content.
So far, a lot of the slides have been lists of links to examples, at least for the sliding, fading, and expanding/collapsing text. And then Scott shows some of the effects at the linked locations.
Looking at link previews, Scott is showing lots of code samples in both AJAX and ASP.
Topic ratings are almost always with stars, seen often on MSDN. As you hover over starts, they light up. Useful to have text to explain what they are for, how to interact with them.