REALLY cool! There was an art project some years back called Kool-Aid Man in Second Life, which was just a video log of a person with a Kool-Aid Man avatar exploring an almost totally empty MMO. It was melancholy, funny, almost archaeological. This gave me the same vibe. Nice glimpses of what the real world is like in this setting, too.
I played around with leaving messages in different places. Sometimes they took a while to load--not sure which end that was on.