Another way of using two cd-rom motors, a twin coaxial contrarotating brushless. Works great see video in this thread. Right now it's just been built in:
http://www.rcgroups.com/forums/showthread.php?t=246407
Some &!*&^@%#!!! Italian we all know also features in that discussion
Movie+sound, 1,4MByte:
http://home.comcast.net/~eljimb0//MVC-610W.MPG