Turbulenz: Quake 4 in the browser with WebGL
Turbulenz is showing off some very cool stuff using their WebGL powered engine. Geek.com has a write-up on the details of the engine running Quake 4 assets in the browser and showing off such features as Dynamic lighting, shadow maps and physics.
Read the Geek.com article on Turbulenz and Check out the video below for more details.