thanks both for the info, and for the link above. Appears to be no dice with online checkin, I was getting an error when trying it.
I called them and the online check-in support person said that Boston has new rules, and everyone must check in at the airport. Unsure whether I should believe that there will be 200+ people for each of the 2 flights tomorrow all checking in at the airport.
Hopefully Copa can check me all the way thru and I wont have to go landside after arriving just to check back in.
Ill update thread tomorrow/Thursday