usmoke, keep in mind schroedinger invented the cat hypothetical in order to mock the inherent problems with the uncertainty principle. i'm extremely dubious about the possibility that the world doesn't exist when no one sees it, because that doesn't explain why multiple people observing things independently and at different times will all describe it the same way.
furthermore it just throws out a lot of standard concepts such as how our eyes work, assuming rather than our brains have an actual profound effect on the world around us, as though our senses are proactive rather than reactive. i'm more than a little skeptical of the type of theoretical physics that tells me that when i'm not looking at my shoes they're everywhere and only lock into one place when i look at them.
but then i'll give it time to flesh out and will reserve final judgment for now.