Playing around with particles and halos produced this smoke. It looks good animated as well. Check it out at the start of my webpage.
Cheers 
Damn! That really look good! Did you use any other textures than the procedurals?
Man I wanna see that animated!!!
Its only procedural tex. I followed the tips from andys website on the making of his movie. I’ll post a blend file for people to download if they want. It looks best when the animation moves slowly.
Cheers