Below is a list of sites that you may find usefull.

Lairdking - Custom home network planning, design and installation

HiddenWires - The home technology resource

Singlepoint Networks - MediaX Suppliers - The futureproofed home networking system

CEDIA - Custom Electronic Design and Installation Association

SmartLife - A magazine that will give you an insight into Inteligent Homes

Automated Buildings - The complete guide to building automation

Peter Sperlich (EIB) - EPS Elektro-Projektierung Sperlich - EIB Partner

Home Toys - A nice collection of gadget ideas (USA)