In the course of some random surfing, I noticed that the latest generation of Shimano's mountain bike components uses the "rapid rise" or "low-normal" rear derailleur, which as I understands it reverses the action of the derailleur in response to a cable pull, i.e. pulling the cable produces an upshift rather than a downshift.
Has anyone experimented with this system on a road tandem? We, like many, use an 11-32 cassette that needs a mountain derailleur for the right cage length. Will my only choice be to learn how to shift backwards if I ever need to replace my rear derailleur? Any plans for Shimano's road shifters to adopt the rapid rise system?