I recently found a free motion capture database that works with 3ds Max.

http://sites.google.com/a/cgspeed.com/cgspeed/motion-capture/3dsmax-friendly-release-of-cmu-motion-database

On this webside are around 2500 motions for human animations. I am currently downloading the files and i will write a comment later how hard it is to implement this to a model in 3ds Max (i hope its not to hard ) and if there are any problems in using this in 3d Rad.

If anyone knows a source for other bone-based animations (animals, androids etc.) or motioncapture data's feel free to post them.

Edit.:

I now have tried to use this animation data with 3ds max and with the viedeo tutorial on the site. Its really easy to use it to animate the biped sklleton. After following the instructions in the video tutorial you have only to resize your model to match the size of your biped and ad a skin modifier. Here is a little tutorial for this : http://www.tutorialized.com/view/tutorial/Bones-Skin-Animation/57642

If your envelopes are well done and you are happy with the animation you can export it to 3d Rad with the kw exporter. It is important to group the biped and the mesh before exporting it.

Thats it, now you have a vell animated human model in 3d Rad. (i think that can be done in less than 2 hours, i tried it only without adjusting the envelopes)