Josh Arnold spoke to the 120 attendees about client-side Continuations. One of the most impressive things was Josh's mastery of the keyboard and shortcuts.
Brandon Satrom gave the main presentation about HTML5, which was well received.
The slides from his presentation are here on github.
My Random takeaways:
Pressing F12 in IE9 will give rendering for older versions of IE of the current page.
jQuery.corner.js is a good polyfill for getting rounded corners in older browsers.
jQuery.Visualize is a simple way to create HTML5 charts from tables.
The excanvas.js polyfill does replicate most of the functionality of the Canvas element, but not all, be careful.