Exporting shape key's to FBX.

Hi,
Like in topic.
Is that possible (FBX to XNA ) .
Thath wolud be great, to somehow export shape key’s (bake to ipo? ).
Because it’s simple to make some various face motion. And also i can’t ,have more than 59 bones on my rig ,so facial rigging ,isn’t possible.
Any ideas?
Cheers!