Just curious, when you said that hive servers aren't tied to accounts and that you can move servers, how much goes with you? I know you said cars stay in your original server, but does everything you've accumulated in a specific server stay in that server? If I bought a house in one server I assume that same house in another server would belong to someone else? What happens if you've gone into another server and then you can't go back into the server that you started in (with your things) because that server ended up at full capacity whilst you were in another server?
Also, it'd be really cool if the karaoke idea was extended and music was a career, either being a musician, record producer or owning a record label.