I hate chains, cables, disk lock, and all that schlock. Maybe if enough Captains take interest and hammer them there would be one made. Yeah, pricey, but I like the idea. Beats the cheezy stock fork lock. http://roadlok.com/index.html
If I am drunk one night, any night, I'll have much bigger problems than any disk lock or Rocket for that matter. I just like the idea of one less thing to remove and stow.