I'm not a huge fan of CD/DVD changers. The biggest reason is that once you fill them up they aren't really any more useful than a normal CD/DVD player. And it takes a bit of effort to keep things organized. But this one from Sony is getting there. Now all they need is to give it a rendezvous enabled web interface and it would be pretty cool. (But you'd still have that whole issue when you fill it up).
Part of me wishes I could go into business making things like this. I think so many of the products out there are so close, but just not quite there yet.