With news that the alliance size requirement will be removed for 2.0 and 3.0 raids in the upcoming 4.1 patch, I would once again request the same for the Diadem. The fact that it is not cross-server and requires players to meet before entering makes organizing a party for this near impossible.

Admittedly I don't know how difficult it may be from a coding/programming perspective but since it is being done anyway I thought I'd ask again.