Hello, I've decided to make MoCon open source, which includes my maya2nuke script. It exports cameras and object nodes with animation as a Nuke scene file. I've been using it in production for a while and it works well. MoCon also has a lot of other useful scripts, but you guys would probably like this one best.
For more information and to download go to:
http://www.3dmation.com/mocon/forum/
Barry Berman
3Dmation Visual Effects