The EU's WOW site announces that
Algalon is the final boss in VOA!
So while sites like wow.com and MMO-champ (as of yet) can not determine where the celestial items that have been data mined are supposed to come from, this posting pretty much points to Algalon dropping them. There has been some discussion that Algalon would become more available to other players in Ulduar however placing him on VOA would make more sense and convenience.
