EA Sports have gone ahead and posted all the unlock codes for NBA Jam, along with some screenshots:
http://nba-jam.easports.com/updates/Unlocks
I'm not sure if the Team Jordan code has been mentioned before, I don't recall seeing it but I've just added it to the codes pages in our Wiki:
http://www.nba-live.com/nbalivewiki/ind ... gory:Codes