Wow, some people seem to be quite annoyed with Mr. Irwin. I must admit, when I first saw the "Croc Hunter" on TV, he rather annoyed me too how he handled the critters. I grew up in a houehold in which me dad (also RIP) kept and bred reptiles and arthropods (snakes, tortoises, geckos, tarantulas, scorpions, beetles, etc.) for the pet trade, some of which were dangerous, so I was familiar with the handling of dangerous animals. The way that he approached these animals seems entirely too arrogant and without their due respect. This view softened greatly over time.
I also agree with you, Steve, that Irwin and Cousteau are in entirely seperate leagues (Cousteau was a scientist, Irwin a zealous zookeeper with a TV show), Irwin, in my belief, has done a great service to biology and conservation. Here in the states, I know many people he helped to inspire become biologists and conservationists. In order for the public at large to care about nature, they need to witness it with there own eyes. Many of these people, living deep in the urban sprawl, or simply too lazy, will never see any more of nature that what comes to them through the tube. Irwin offered this cross-section of people a personal look through awe-fill eyes at some of natures most interesting creatures, in stark constrast to the often austere and dispassionate reporting of many documentaries. While I still do not agree with Irwin's handling of many of these critters, and his personality somewhat grates with me, I have a respect for what he has done. I for one will miss him.