They were telling me porky pies then.
Did you ask the question before you started to build or only when you spoke to the supervisor?
I think I'll be in the same boat as you, having to wait for the LCD / Plasma, but definately want the wiring done now.
I didn't ask before I started building (and wouldn't recommend you) otherwise they will say big "NO". I just asked supervisor before sending my guys to do the cabling. Supervisor (Greg Reynold) is quite good and flexible person as any other Carlisle staff. I will say, when your house reach framing stage then talk to your supervisor and hopefully he wouldn't create any hurdle for you. Plan your projector cabling (VGA/XGA, component, HDMI etc) and speaker cabling (5.1/6.1/7.1) in advance and get your guys or yourself ( I done it through Eclipse Security phone: 0397689007) to do what you want. My theater room cabling still sitting in the wall and roof and probably will be there for another year or so