I'm considering getting an external keyboard and mouse so I can use my MBPr in clamshell mode, but am not sure I could give up pinch zoom which I depend on A LOT. So I'm now looking at the Magic Trackpad. I've gotten so used to the location of the trackpad on my MBPr that it's hard for me to imagine using it to the right of the keyboard. Is that something you get used to pretty quickly? And does anyone here use their Magic Trackpad in front of their keyboard to mimic the MBP trackpad? Any feedback much appreciated.