A Fingerboard is a microcontroller PCB with a Motorola 68hc11 processor and wiring compatible with the MIT Handyboard/Interactive C system popular in many amateur robotics circles.

Some features are:

The most significant feature of the Fingerboard is its small size: 2"x4" in the second revision. This makes it ideal for very small robots that nonetheless need more computing power than a PIC chip can provide.

Fingerboards are sold by Embedded Aquisition Systems (http://www.embeddedtronics.com/).