Wall stickers from the french company Domestic. You can find some of these at american retailers like urban outfitters, but this site has them all for sale, of course, you'll have to deal with the conversion rate and shipping from across the ocean...

http://www.domestic.fr/index.php

more from Tracy Kendall but these aren't so cool...and there doesn't seem to be a way to purchse them from her site. Lame.

http://www.tracykendall.com/main.php