Flash is 3d now with open source plugins, so I would personally use that for simpler 3d work due flash being on most computers.

http://blog.papervision3d.org/

http://www.flashsandy.org/

What is the director interface like for 3d now? I tried it years ago as a demo when it first came out I found it fiddly, Ill try the new demo when I have time.