I just released a keyframemapper plugin for shake osx – a swiss army knife for keyframe mapping. You can get it here or on highend3d.com .

I developped it in the first place to be able to fit the changements in parameters to our cartoon renderings and stop motion animations after retiming. I still have the script that converts the cambridge animations animo dopesheet to shake script …

Let me know if yo like it, if it is useful to you or if you have any suggestions to it.