With everyone searching the room, no one finds anything of note, not even anything inside the teapot. Si'Nat does cause something to happen when he checks the tea cup: When he touches it, it begins to speak:
"Three crystal notes;
Two Silver Drakes;
One ruby sword;
All will smash the Demon's Eye,
And lift the curse from Haven."
Standard checks on the south door reveal no traps or sounds. Opening it, you see another corridor similiar to the one in the north. There's a door in the south wall opposite you and a door in the east wall.