Telene,

About a year I ago I ran into the same problem. After some experimentation I came to the unfortunate conclusion that RawKee has some serious limitations and is incapable of handling any complex  hierarchies which are done routinely in Maya rigging for animation purposes. What you are saying now makes me think that there was no improvement to this problem since. That's too bad, RawKee had the potential of becoming a great tool, but I guess 'that's life in the open-source': It is not always the most reliable route (and at the end you might be paying more for something that was supposedly free...)

I recently read about a plug-in called Called ColladaMaya by feeling software.
http://www.feelingsoftware.com/content/view/55/72/lang,en/

I haven't had a chance to try it out but I believe it could export animation to x3d.

If you try it out - please let me know if that works -

Thanks,

h