One of the features I've seen on network cards for as long as I can
remember is Wake On LAN. I've known what the feature is and how it works
in principal but never taken the time to set it up.
Yesterday I took the time to google around and came across This How-To on one of my favorite OpenBSD info sites, Calomel.org.
I setup a cron job on my OpenBSD router to wake up my Ubuntu box in the living room at 5:30pm, and another cron job on the Ubuntu box to poweroff at midnight.
Now i'll waste just a bit less power in my home. Now if only I could get my electric bill below 1000kWh per month...