You could use a phone modem, ring that up & get it to wake up on that if it works.
I seem to recall something about either that or the LAN bit not working in the UK, so it's something to try.
If you want it on at set times, just use a cheap mains timer.
How about ringing up an old tape answer machine with string tied to the tape drive motor, connected to the guts of an old mouse, so that it turns the mouse wheels, which in turn makes the PC come out of hibernation (with auto logon) Now thats what I'd do!
