My buddy Kai Carpenter (Deviantart | Portfolio) just put some prints up for sale on Etsy! Go buy them.
I love Kai, but I also hate him because he does these in goache, and that just seems like goddamn magic to me. My memories of using gouache in school are strained and frustrated and often chalky, so seeing a fellow artist take to a medium so naturally is a serious kick in the pants, inspiration-wise.
Go buy some of his beautiful nonsense here, if you have the chance!