I would argue, for those who say there is no community in TOR, that a server wide LFG would help build relationships with people and build a community beyond the people you already know. For example, you get in a group with a good player you friend that player. Then start grouping with that player more, opening up his friends to you and yours to them. That in turn increases the number of players you can look to for running flashpoints and what not. Things snowball from there. Cross server does not accomplish this.