At Tarongo last year I saw this massive Komodo. He would have been easily over 2 meters (6ft 5"). He didn't move much while I was looking but I don't particularly want to imagine him chasing me, they can sprint up to 20 km (12mph) in short bursts.
As of May 2009 there are only two institutions which house Komodos in Australia and none in New Zealand. They are quite rear in zoos as they often suffer complications in captivity.
Inside the reptile house there were two much smaller dragons, approximately 1 - 1.5 mtrs (3 - 5 ft) in length. These two were much more active and seemed to pop out of the trunk to say hello. I hope that doesn't mean I looked like dinner.