It's just one of those thinngs that people have to discover on their own, like an epiphany.
They just need some of those "Holy Shit, is that all you have to do on a Mac to set that up??"
It's hard though, the facts and arguments can all be right there. You have to talk to people one on one, noy JUST pointing them to websites. By actually talking to people for about half an hour or so, I've got my dad, two of my friends, and a co-worker to buy iBooks, one co-worker bought a dual 867, and another co-worker bought a TiBook. If you're in a position of trust with some people, they'll usually listen to what you have to say, and selling Mac vs PC is pretty easy unless you're talking to gamers or corporate/IT drones.