I found a thread on this subject from quite a while ago and I'd like to suggest something of my own liking.
I've been using Blender on my MacBook for quite some time and they finally nailed it with 2.66.
2-finger swiping for orbiting the camera
Pinch/spread for zooming
shift+2-finger swipe for panning
In my opinion it doesn't get easier to control the camera than that. I actually prefer the trackpad over a mouse now using Blender.
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