I just added this to the
wiki because when I first started using bitcoind I couldn't figure out how to stop it either without resorting to some googling and finding 'bitcoind stop' in a random thread from these forums.
by the way whoever posted this screenshot on the client page, nice brag. Am I 'jelly'? Yes, I am jelly.

Those are testnet addresses. They start with m or n instead of 1. The testnet has been reset a while ago (and probably will be again) so difficulty was 1 and it was *really* easy to generate