All FW400 MDDs support OS 9.2.2. This includes the "MDD 2003" made after the FW800 models.
None of the FW800 MDDs can do 9.2.2. As you may know, these are the ones with the single FW800 port on the back, and an Airport Extreme slot on the logic board instead of an Airport slot.
None of the FW800 MDDs can do 9.2.2. As you may know, these are the ones with the single FW800 port on the back, and an Airport Extreme slot on the logic board instead of an Airport slot.