I picked up a commission by Ciro Nieli a few years ago from Powder. I still think it's pretty cool:
I ended up sending it off to Gerhard (of Cerebus fame) after he did such a great commission for me years ago. He has examples on his site of collaborations he does with the white space around commissions by other artists. As this piece had a lot of white space, I wanted to see what he could do. He did not disappoint.