Razer BlackWidow
Cherry MX Blue, Laser-engraved keycaps, 2010

The Razer BlackWidow is the first mechanical keyboard being marketed as a "gaming keyboard" that uses Cherry MX Blue switches.

It is produced by iONE in OEM for Razer. The BlackWidow comes in two versions: The BlackWidow and BlackWidow Ultimate. The Ultimate will come with full back-lighting and USB and audiojacks in the case. It appears that the board is probably nearly identical on the hardware level since the PCB features empty solder points for back-light LEDs as well as the audio jacks.

I have written an extensive review on this keyboard over at geekhack. If you are interested in reading more, please check it out.