I went to a local art market last night Christmas shopping and stumbled upon some work by photographer Greg Davis. I was impressed with his photos immediately, and then I read that he took them all with a 4 MP Olympus C750 compact camera. He had prints that were larger than 16 x 20, and to my eye, they looked like they came from a much higher resolution camera. Shows what I know.
I was just on his website a minute ago, but now it doesn't seem to be working. I'm posting the link anyway. Hopefully it will work for you:
http://gregdavis.smugmug.com/Travel/102647
Paul