Arm yourself with a Webkit browser (Safari / Chrome) to understand the impact of the following:

• Pure Icons in CSS - insanely impressive and proves I have much to learn about CSS3.
• CSS3 World Clock - just like the iPhone app but without the use of images... I see a few artifacts in the clock face but, overall, super nuts.
• HTML5 Shiv - a promising method to make IE recognize HTML5 elements. If you can't wait until IE9 is released (and adopted), force the browser to understand. Approved.