The stats page pyalot2 links to is his, at http://webglstats.com/ which is great. I'm really looking forward to pointerlock and geometry instancing, which should allow for a lot more complex scenes.

No pointerlock has been the bane of my game project, but I still have a long way to go, so I'm sure it will be out long before my game is completed :)

I tried to keep the article short and skimable, let me know if there's anything you think should be added or changed.