Ernie Ball Axis Capo; Two-Sided, Aluminum, and Classy
The Axis Capo is a pretty cool new style of capo. The advances of this are sort of subtle, so here's the scoop: It's lightweight aluminum (not plastic), so there's less chance of breakage. It has one straight clamping side, and one curved clamping side. This makes it much more likely to capo all of your guitars efficiently, instead of just some of them. Both clamps (jaws) are firmly padded to protect your strings and your neck finish. Ernie Ball number is PO9600.
Watch the hokey video to see it in action.