Ok, now that Finale 2007 has arrived, the puzzle pieces have fallen into place.
Here's what I know:
1) K2 Player is included with Finale 2007. They also support the full K2 if you so choose.
2) GPO Finale Edition has been recoded to run under K2 Player
3) The FULL GPO and JABB still work with the same K1 Player (as before)
4) K2 Player is not Mac Universal Binary (yet) from Finale. It will be when NI releases it.
Here's what I think I know:
1) Gary G. et al. are recoding GPO and JABB to work with the K2 Player
2) New products "Marching Band," "General MIDI," and others, will come out native K2 Player
3) The delay was caused by NI, not Garritan
4) This stuff is getting better with each passing day