When I first saw pictures of this artist i couldn't image that someone can brush this in photoshop. But it was true and now he is one of my favourite digital artists. JamesTu is a 20 year old student from the United Kingdom but worth enough for an interview. His gallery can be seen on Deviantart
My friend PaulW has uploaded a lot of great Photoshop brushes over at DeviantArt.com . If youre interested in abstract art you have to download them. PaulW is an awesome graphic designer from the UK who made great brushes like abstract, grunge or vector brushes for you.