Ordered  a  "Das  Keyboard Model S Professional" today. I still own an
  original IBM Model M keyboard (part number 1391403) but I can't use it
  on my main machine:

    -- It doesn't have a "Super" key. I definitely need that key.

    -- My  current machine does not have a PS/2 port nor does it have an
       AT port. USB adapters for those two connectors suck.

  Although being built in 1985, the Model M still works flawlessly. Many
  children  "used" my keyboard, so I'm really honestly surprised that it
  still works.

  I ordered the version with Cherry MX Blue keys[1].  I'm curious how it
  feels compared to the Model M. Nice bonus: The keyboard has a USB hub.

  I'm  a  bit  saddened,  though,  that  I  won't be able to use the Das
  Keyboard at work. My colleagues would kill me. :-)

  ____________________

  1. http://deskthority.net/wiki/Cherry_MX_Blue