I got it working using this from androidcentral from "tutomate." I just changed a few things from the OP.
Also Remove and reinstall EVERYTHING. TiBu, Google Voice, and MyBackup Pro. Also removed the folders where they save the backups at. TiBu saves in a folder called TitaniumBackup and MyBackup Pro saves in reware.
1. Made a backup of GV in MybackupPro (app+data)
2. Made a backup of "MyBackupPro" with TB (from my phone)
(After this you want to copy BOTH of the folders "rerware" and "TitaniumBackup" to your Xoom).
3. Restored MyBAckupPro from TB on Xoom
4. Restored GV from MybackupPro (make sure to hit DONE, not open, when the box comes up saying its installed)
5. I got an error saying something about that it could not find the market link, dont freak out yet.
6. hit ok, then it says to restart your phone to see your changes.
7. Restart your Xoom, google Voice should be there and open it.
8. you should see your indox, then OH DAMN, FC.
9. Hit Force close then look at your Notification bar. Should see something new.
10. Hit the icon and should ask you to allow the permissions. Allow them.
11. Open up Google Voice and say woot!.
Tell me if this helps anyone, or if anyone has problems.