"Purely mechanical", [strike]Cherry Brown[/strike] Cherry Black keyswitches (although they seem unusually quiet)
1000Hz USB polling rate ("response time is really quick", "first keyboard of its kind")
Multimedia functions
Fat Backspace/Backslash keys (oh yeah)
USB hub (1C/2P) and Mic/Headphone audio connectors (pass-through)
Fat "military grade" sheathed cable (USB with PS/2 adapter)
"Coming out for Thanksgiving/Christmas"
"Gaming optimized"