I love 'em. Friend has a three wheel Harley with wire wheels like yours Bill. V-twin engine with dual exhaust sounds outrageous. Big disc brakes! I saw two for sale at a local dealer, check this link:
http://www.triketalk.com/
Also reverse trikes are getting popular, seen 'em in England and Canada. I saw one that was driven by a big Kawasaki.
http://www.reversetrike.com/tr1ke.html
For myself, umhum, cough, cough, I've been big on trikes for the past five years. Built six so far, all with electric motors. Setting up a new one with Kevlar tires and a disc brake on the front wheel.
Currently working on a KERS switch and maybe an "F duct." :-)