Hi Sam,
I am no expert, but when I did mine in my house and it turned out nice.

1. Speaker wire 16 gauge, I used banana plugs and wall plates.
http://store.svideodotcom.com/a30602rd.html
http://ehdmi.com/products/subdepartment.asp?c_id=104&cp_id=10425&style=
or eBay

2.If you are running your computers to a wired router you need to run CAT5 Cable and get keystone jacks for the wall.
http://www.wisebuynow.com/product_info.php?products_id=50
http://www.9thtee.com/networking.htm "also have jacks for your cable if you are going to run your cable to a few rooms and to your router for the computers"
or eBay

It's just a starting place to look, you can probably get better pricing if you shop them around.
I hope this will help.

canman1355

If the drywall isn't up yet, you could consider putting in conduits so that future upgrades in wiring are not so difficult. You might also consider two runs of Cat5 to each room or to opposite sides of larger rooms. It's cheap to do it now and it keeps you from having to run network and phone signals over the same cable.