I don't know why Tawny's link is broken, there have been similar so I think there must be some kind of forum issue.
WoL has been addressed in the custom firmware section but I will summarise for you: as far as we can make out there is no hardware support in the HDR-FOX (and therefore presumably the HD-FOX also) for it.
As this is the HD-FOX section I presume you are streaming recordings decrypted by HDR Mode using MediaTomb (the HD-FOX having no native capability).
The only options you have for unattended power up are to set timers for power on (must be paired with power off or it doesn't work propery) or a schedule reminder, or to use an AV sender as a remote IR repeater.
Regarding search, the standard forum search doesn't handle search terms with fewer than 4 characters well, or quoted strings, so it is sometimes more effective to use Google and include the prefix "site:hummy.tv/forum" in the search box.