Son changed password on iPad, need to recover Pages document
Since necessity is the mother of invention, I've found my own solution...

Sync'd iPad with iTunes as usual, restored iPad to factory settings, then restored iPad from backup.

I feel like a fool for not seeing this off the bat, but if you knew this boy, you'd know what was at stake with him losing his work.  I have a feeling that he won't set anymore passcodes on his iPad nor will he forget to backup to iDisk.