Khoomei wrote:

How about for drop bars as well?

A German company (Norwid) makes a separable road
handlebar suitable for mounting the Rohloff twist grip.
Last I heard, these bars were available through Rohloff's
US office (contact info at www.rohloffusa.com).

Or you can make your own twist grip:
http://www.qnet.com/~crux/twist.html


Tom Ace