A friend of mine had a 650b touring/randonneur tandem built by Bilenky, and he and his wife are very happy with it. Note the big difference in height between captain and stoker:
http://www.serotta.com/forum/showthread.php?t=39535
Mordecai Silver NYC This email is intended for the recipient only. If you are not the intended recipient please disregard, and do not use the information for any purpose.