If you don't have a iPhone or an iPod Touch this won't app doesn't apply to your device.
For $2.00 (or if you are jailbroken) you can obtain copy of an application called "Sleepover"
Sleepover is a small application that sends the Wake On Lan packet to your Desktop by entering the computers NIC mac and the IP Address.
If you have a router you'll need to use there documentation because not all routers will have the same functionality using WoL.
