Hey Burr,

Cant remember where I saw this, and I've never used it, and I know you dont need it... (lolz, kind of makes me wonder why i am typing this :D ) but this has always looked interesting to me. http://www.cncwrapper.com/ Looks like one could get a cheap 3 axis toolpathing program and get to 4th axis the hard way with it... but for $20, thats a pretty cool option.

-Nick