If you've heard of the Optimus Keyboard, then you may know of the mini which serves as 3 multi-function shortcut keys with OLED displays. You can write your own plugins, but it looks like they plan to support a bunch of apps including Office, Adobe CS, etc.
Image used without permission :/
Just a friendly reminder to both you and me, but after Tuesday, August 1, the price jumps 25% from $120 to $160. Windows only at first.
SOURCE: Digg (for the mini), although I believe I was sametimed about the original keyboard.