While cruising through flickr I came across this awesome artist. His style is completely different from what I've ever even attempted to do but his art is captivating and thought provoking.
He also gives away lots and lots of textures and brushes. Take a look at his stuff.
I did a quick play with 3 of his textures (used the same 3 in each picture)and I love the texture he titled Chaotic Soul. Just so much fun to play with.