Useful Links For HAMS
Hepburn Propagation Logger(ZL-VK)
Alan ZL1AMW and APRS -- Track stations live in ZL at this site.
Grant ZL1WTT has some interesting ATV related info with Antenna designs also.
Tim ZL1TN has 6m information amongst other things as well as TV info
Ian ZL1VFO with TV info and bits on how NICAM works.
Murray ZL1BPU - the Digital Modes and AVR guru has a treasure chest of info.