Before you spent more time on Wake On Lan, I'd like to share my experience:
I simply used this site:
http://mobile.wakeonlan.me/It's fantastic, I know my hostname so I just saved my MAC address in Yahoo! Notepad.
Now I can wake up my pc from anywhere in the world. And this site is also very accessible on any mobile phone.
THE DOWNSIDE:
most modems/routers send a signal to every attached PC every now and then. Could be after 4 hours, after 8 hours or after 1 hour. This signal is ALSO interpreted as WOL signal. Thus your pc wil start up...
Its annoying, when I go to the bedroom at night and see a light burning.... the PC is on! but I shut it off!?
Or when you leave the home, come home and the PC was on all day or the whole week or whatever.
After a while I disabled WOL... since there is no solution for this. And it was more a gimmick feature for me.