Guys at VeryImportantPixels are creating a pixelized versions of the famous and important people (both real and fiction) - some of those are really cool! Btw. There's a twitter contest going - 5 lucky winners will be pixelaized by VeryImporantPixels and placed on their site.
Juan Manuel Daporta is a great pixel art designer based in Venezuela. His pixel art building diorama got a Deviation of the Day award at deviantart.com - that's something!. Take a while and check his Deviant art gallery - it's really worth it.