Some links I found!
http://www.redbubble.com/explore/composite+image
http://digitalphotobuzz.com/digital-composite-photos-and-art
http://fineartamerica.com/art/all/digital+composite+art/all
http://psd.tutsplus.com/tutorials/tutorials-effects/100-artworks-from-the-top-digital-artists-in-asia/
Here is a video I also found interesting.
http://digitalphotobuzz.com/creating-a-creative-digital-composite
