I have a tutorial on my blog which talks about a way of doing particle systems in OpenGL on Android. There is also an example of using Box2d and OpenGL. Have a look if you're interested. I'd like some feedback on how I'm writing the code and if they are useful for people.

http://www.bayninestudios.com/category/particle-system/
http://www.bayninestudios.com/category/box2d/

Thanks.

This looks great mate... I know I'm a bit late with a comment! Will go through it over the next or so!