Despite any reports to the contrary the Quatros have been shipping in limited numbers for several months now. Delays are mainly related to amplifier parts for the subwoofer system.
See my system for my comments in the speaker itself. As for new purchases/delivery dates you would have to work with your dealer on that. In any case, you should be able to get a demo of them soon if they're not already there.
Arf, if you've ever tried manufacturing a product you would already know the answer to your question.
Hope that helps!