Case's Ladder - http://www.casesladder.com/browse.php?game=Hearts Listing of multi-player leagues.
My League - http://www.myleague.com/cgi-bin/ladder/browse.cgi?service=Hearts&my=1 Listing of user-managed multi-player leagues.
Nova Hearts - http://vex.net/hearts/hearts.html Standard four-player game. Includes rules and FAQs.
