a nice site to code, test and share webgl scripts
http://webglplayground.net/
there is a public gallery : http://webglplayground.net/gallery
want more webgl samples ?
http://www.chromeexperiments.com/webgl
http://code.google.com/p/webglsamples/
https://developer.mozilla.org/en-US/demos/
http://playwebgl.com/demos/
http://www.zygotebody.com (this demo is really impressive)