I can't point you to a site, but things to consider are:
TV- how are you going have connections get to TV. I had them routed behind the dry wall.
- How far is your tv going to be from you components? A consideration for the type of connections you want to run. (sound, component video, HDMI, etc...)
- What type of TV do you have? Some use modules separate from the TV. If this is the case you would need a compatiple cable installed behind the wall to where you mount your TV to where your components will be before the dry wall is installed.
- Have a power outlet installed sowhere the TV's power cord will be hidden from view.
- Where is the subwoofer going to go? Think about how you will connect it and where will you plug it in.
These are things I had to think about during new construction. I hope this helps.
jason