Canvascape: browser based FPS?

Canvascape - 3D walker is a nifty script cooked up using the "canvas" function supported by Firefox 1.5 (on windows) and Safari 1.3 (mac). It doesn't do much, just walk around a very basic maze and jump, but its a really fantastic proof of concept that could easily be turned into any number of homebrew game ideas. And since its done in browser with no additional software needed (not even flash!), it could easily catch on with even the most casual gamers. Good work Mr. Joffe. I'll be watching your career with great interest...