The original OLED keyboard "optimus" has a price of 1,564$. Now Art.Lebedev are offering more models of the keyboard, which will cost less and have less OLED displays.
The differences between the models boil down to how many keys integrate OLEDs. $1564 buy a full LED version with 113 LED keys. 47 active OLED keys (all letter keys) will ring up at $999, 10 OLED keys (function keys) will cost $599 and if one OLED, integrated in the space bar, is enough, you will have to pay $462.
They hope to ship the keyboards in February 2008.