Sad to see that service is bad both sides of the ditch. Rebooting is usually hard disk related and can be fixed rather easily your end if you want to give it a shot. Probably only a software glitch and not a hard disk failure unless you are extremely unlucky given the age of the unit. Anyway give me a shout if you want the instructions.

As for a new model in Aus/NZ? I highly doubt it. TiVo has been an abject failure on the whole not selling anywhere near enough units to even consider them sinking more money into developing the software/hardware to make a new model work over here. Very poor after sales support has not helped either.