Cost, effectiveness, learning curve. Several things I would be interested in. I would buy one if it could be proven to work well. There have been numerous options available to people who have the desire to check them out. I had looked into the programmable keypad already mentioned. There was also leap pad which was a take off on the keypad idea and then there is the supplemental mouse setup. See the link. It is a programmable device that allows you to use the pitch and yaw features to control zoom/pan/rotate and with programmable buttons. They also have a new one out called the space pilot.Originally Posted by todw
http://www.3dconnexion.com/spacemouseplus.htm