since a lot of people were asking for a WebGL miner and I'm interested in this too I decided to write Hamiyoca!
Unfortunately the WebGL speed is even lower than what I've expected, but take a look by you own here: http://bitcoin.biniok.net/gl.html
For me this is working on Firefox 5.0 and Chrome 12. Other versions might work too.
If you want to review the project source: this is located here: http://code.google.com/p/hamiyoca/
Because I'm a WebGL beginner, I'd appreciate any hint that might speed up Hamiyoca and of course, donations are welcome too
So maybe we can discuss here a little bit about improvements and some of you can report your hashrate with your OS and Browser version and the used graphics card.