DailyTech writes the Optimus keyboards have almost approached vaporware status as they have been delayed once more:
The Optimus keyboard has a "Don't expect until late 2006" status on the Art Lebedev Studio web site. The mini three keyboard that was supposed to be released on May 15 will not be shipped until at least August 15, 2006. The mini three costs $121 and will feature a 6-bit, 96x96 pixel OLED display on each key, which is capable of displaying 5 frames per second.
More info over here.