Go to
http://www.finalfour.net and check the box scores and game stats there. You can find the officials for most of the games.
Yes, the names are kept very secret. Officials names are released one hour before the first game of a session or at the begining of halftime of the preceeding game. Also, hometowns and conference associations are not released (although announcers can figure out some of the conferences from watching games throughout the season).