Poolga is a site where you can download pretty wallpapers for free. They say: "We're Poolga: iPhone, iPad and iPod Touch wallpapers for the rest of us. Curated design and illustration for mobile devices. We focus mostly on illustration, graphic design and typography."
JC (Juan Carlos Cammaert - Curator, founder) has been nice enough to include me in the massive library of downloadable goodies. Cheers JC !