The popular HTML5Rocks website got a nice update in the last few days that gave it a huge visual overhaul. The new site is still an awesome resource for web developers who want to learn more about the power of HTML5. Google is a big contributor to the site though they have published tutorials from many other contributors. You will find great content on bleeding edge topics like WebGL which RIM just added to the PlayBook and is the first tablet to support the technology.
Check out the site at www.html5rocks.com