How to wake another mac on the LAN
I found this utility that did just what I needed: wake my mac mini server from my macbook pro over the LAN. I have had 100% success so far. Here's the summary from the website:
"WakeOnLan discovers all other computers in your LAN, and enables you to wake them up by clicking a button. If your remote computer is a Mac you can put it asleep too."
It includes a great little os x widget to wake the remote computer so you don't have to open the application.
Download it here: http://www.readpixel.com/wakeonlan/




