[jbogp]

Big difference between this one (which is great) and OP's is that OP's done all the WebGL himself whereas Nop's uses Three.js

[nopjia]

here's one with 1 million particles done in vanilla WebGL

http://www.iamnop.com/particles-mrt/

(it's a little unstable since it uses WEBGL_draw_buffers)