Finally got the Programmed time to wake the system working using the Advanced Configuration and Power Interface (ACPI).
The Real Time Clock (RTC) generates a hardware wake event when in the sleeping/power off state. A very nice feature for a PVR.
Updated the mythTV wiki pages.
Currently not working in openSUSE 10.3, more info on the wiki page, so production system is
running openSUSE 10.2.