DX1 Input System by Ergodex

Ergodex has an interesting input system that comes in the form of a pad and
25 keys that the user can arrange in an arbitrary manner. The keys have an
adhesive surface, but can still be moved. The adhesive surface is designed to
be washable with a simple damp cloth.  

Personal Pad with Key Tray and 25 movable Keys, numbered 1 to 25. Pad
communicates wirelessly with Keys. Record button for "on the fly" Macro
creation. Keys placed anywhere on Pad. Ergodex Manager software. Connects via
USB. Windows 2000 SP3 or Windows XP. $150 

Ergodex
http://www.ergodex.com/mainpage.htm

Ergodex DX1 Redefines Input Devices 
http://www.extremetech.com/article2/0%2C3973%2C1555134%2C00.asp?kc=ETRSS02129TX1K0000532

The Ergodex DX1 Input System tops the list of new products in terms of
  creativity, but it lags behind in affordability.
http://hardware.gamespot.com/Story-ST-16045-1849-x-x-x

The Ergodex DX1 Input System offers support for up to 50 keys, complex macros,
  and the freedom to make a keyboard that suits your needs.
http://hardware.gamespot.com/Story-ST-16045-1608-x-x-x

Ergodex DX1
http://www.gizmodo.com/gadgets/peripherals/input/ergodex-dx1-035564.php

Ergodex DX-1 Input System lets you build a custom key layout
http://www.engadget.com/entry/1234000967040661

Ergodex DX1 Input System
http://gear.ign.com/articles/605/605225p1.html