You don’t by any chance happen to have six fingers on your right hand? If so, FingerMgmt will let you track the movement of all eleven of your fingers on a Macbook multi-touch trackpad.
Yes, the latest Macbooks and Macbook Pros can track eleven points of contact on their pads. Seems somewhat excessive to me (by about 10%), but I guess they’re just planning ahead for when they release Macbooks with trackpads big enough for more than two hands (or perhaps touchscreens of similar size). While I’m not a fan of trackpads, I would be interested in seeing trackpads of unusual size.
Anyway, Johan Nordberg (who seems to hate bananas) has crafted a little program to plot those points of contact when you touch the trackpad and show them to you graphically. Doesn’t seem like much more than a diagnostic tool in itself, but could its potential stop there? Inconceivable.