Mark McCall

http://www.automatedhome.co.uk/

Marks excellent HA site which was one of the first I discovered. If you visit no others go to this one and catch up on the current HA scene in the UK.

Krazy Keith's World of
DIY Home Automation

http://www.diyha.co.uk  
Keith Doxey must have been born with a soldering iron in his hand! His site is a huge on-line resources for everyone interested in HA and electronics! Keith is also now selling his famous KAT5 modules for sending high quality audio and video over CAT5 cable.  Don't miss this great UK site.

James Hoye

http://www.home-automation.info
This site is meant as an insight into my DIY and Home Automation fiddlings and experiences. As I'm partway through renovating my house, unfortunately some of the pages will be presented as the finished article, although I shall endeavor to share any useful information/experiences.

Dr John Tankard

http://www.sawood.co.uk
Johns site covers some of the detail of the development of a TCP/IP automation system based on the Rabbit Core. The site shows what is possible with weather stations a page shows the current weather conditions at John's house.

Future Flat

http://www.futureflat.org/
"This site is intended to give you an insight into my experiences with automating my home" Stuart Whytes experiences automating his flat! Includes tutorials on how to convert an IR7234 for mounting in a standard 2 gang wall box and how to convert the cheaper LM12/AM12 modules for use in star wiring systems.

Frank McAlinden

http://www.users.bigpond.com/armagh/ 
A HomeVision & Genisis Alarm user in Australia.  "The purpose of this Website is to share my Home Automation related experiences with fellow enthusiasts."

Laser Business Systems

http://www.laser.com
My favourite site for home automation goodies and the host of this site. There are some very inovative goodies on this site as well as all the usual products and well worth a good nose around. Happy hunting.