An Asus Eee PC 1005HA with Windows XP is used as server and is on 24 hours a day. This is actually a netbook, but it has some advantages such as low power consumption (about 15 W) and built-in UPS

Using Switch King I am controlling about 20 devices and most of them are for lighting (both relays and dimmers). For the lamps I am using the built-in sunrise/sunset function except for a few where I bring in solar insolation in the Goteborg area as a data source and control based on that (described in this guide: http://www.switchking.se/en/use-solar-i ... dusk-relay).
In my bedroom I am using a lamp with a dimmer to simulate the sunrise (described in this guide: http://www.switchking.se/en/simulate-su ... ur-bedroom). I am using one additional lamp with relay to boost light further after I have ramped up the first one to 100%. This has proved really helpful to wake me up in the morning during the dark winters in Sweden

I also control my stereo equipment together with Apple Airport Express routers to stream music from the computer. That way I can sit by the computer, turn on all the equipment and then start streaming music from for instance Spotify.
When Tellstick Duo becomes available I am planning to add dusk relays, motion detectors and temperature sensors to the system.