Justin Quimby
There is a guild system in DDO. Players will have guild chat as well as a guild leader can promote officers who have additional guild abilities...[more]
http://ddo.warcry.com/scripts/news/view_news.phtml?site=37&id=47319
Xundau
There will be guild-like player organizations in the game. Not sure if they will actually be called "guilds" in the game, and I can't go into any of the details right now, but yes, they will be in.
Ken Troop
There will be guilds in D&D Online. One of the great things about Eberron, the new WOTC world setting in which D&D Online is based, is that it is rich in intrigue amongst very powerful organizations - think of them as high-magic fantasy corporations. These organizations want to form alliances with guilds of players to serve their own ends, so not only do guilds in D&D Online serve the essential purpose of allowing a large group of people to form bonds and coordinate adventures, they also are the main path through which players can interact with and gain benefits from the various organizations...[more]
http://pc.gamezone.com/news/04_19_05_02_05PM.htm