This guy does some amazing work...
http://cosmos.bcst.yahoo.com/up/player/popup/?rn=49750&cl=2874516&ch=49799&src=news (http://cosmos.bcst.yahoo.com/up/player/popup/?rn=49750&cl=2874516&ch=49799&src=news)
That guy really is amazing! He's not the only Lego artist I have seen though. If you do a search on Google for Lego artist you can find quite a few websites of various artists.
Kevin
This is truly amazing