Ritchey Breakaway Tandem
Here's correspondence from Ritchey:
RD Info Line <email@example.com>
11:20 AM (5 minutes ago)
Thank you for the email, we do have production of the Switchback Break Away Tandem in the works. However we are still finalizing the case design for the tandem, once we have a these finalized we will have a true ETA for the availability of the Break Away Tandem Frame Kit.
Ritchey Info Line
Ritchey Design USA
That could be a very interesting bike. I found this video of Tom Ritchey talking about it with a bike in the background
Third video down the page.