Today my server became unresponsive. It looks like apache was eating all of the memory on my computer, as I saw before. Luckily, my wife was home so she was able to reboot the computer.
I wanted to find an easier way to reboot the computer remotely. I found the Dataprobe iBoot is a device that can cut power to any device that is connected to the electrical outlet. It also looks like you can configure it so that a it will cut power and restore it if this devices doesn't receive any network pings.
It looks like this will be available at the end of August for around $250.