Someone on the SLED listsserv posted a message about a new 3D controller that he uses for day to day Second Life navigation, as well as machinema.The device is from 3D Connexion (a Logitech Company). They make a whole line of professional controllers, but this new one called the SpaceNavigator is an affordable price at just $59:
The post to the listserv also had a link to a forum message about a third party driver that makes better use of this new device. Here’s a link to the driver for the alternate device driver listed in the forum: http://rbc.duckinegg.com/
I think I am going to have to check this out myself. I will post a review once I’ve had a chance to pick one up and take it for a test drive. Don’t miss the video demonstration linked at the product page.