#4 - Aug. 5, 2009, 2:04 a.m.
Trial of the Champion is the 5-player Crusaders' Coliseum dungeon. On normal mode this dungeon will reward no emblems or Champion's Seals. Heroic mode will reward one Emblem of Conquest and one Champion's Seal for each boss killed.
Trial of the Crusader is the 10- and 25-player normal mode raid dungeon. It will reward Emblems of Triumph.
Trial of the Grand Crusader is the Heroic version of the 10- and 25-player raid dungeon. At least one player in the raid must have completed Trial of the Crusader to unlock Trial of the Grand Crusader for the raid. It will reward Emblems of Triumph.
Each week following the patch one boss will be unlocked in the raid dungeon. So this week only one boss will be available; after next Tuesday's maintenance two bosses will be available, and so on.
The raid dungeon will have four separate raid lockouts (10-player, 10-player Heroic, 25-player, 25-player Heroic).
This and more is covered in our Crusaders' Coliseum and Isle of Conquest Q&A:
http://www.worldofwarcraft.com/info/underdev/coliseum-qna.html