Hardware Accelerated Holidays
The IE9 team have put together two HTML5 sites. The first is called Santa's Workshop, a site that lets the speed of your browser define how many elves can help pack Santa's bag, and HTML5 Blizzard, which shows you how many snowflakes can be animated at 60FPS. The site uses CSS3, HTML5 canvas, WOFF fonts, and SVG. So go install IE 9 beta and give these a try.