[dshep]

I hadn't ever noticed that, but it must be because of the trackpoint. The trackpoint is centered in between the home keys so you can reach it with your index fingers, mouse buttons below that for thumbs, and thus trackpad below buttons. The root issue is that the place you rest your hands on a qwerty keyboard is slightly left of center.

Edit: now I can't unsee that MBP has its trackpad right of home key center :)

[ryanmonroe]

Well, it has a thinkpad-sized trackpad directly under the home-key center, plus some extra area to the right ;)