On his latest blog entry Tobold discusses the new World of Warcraft LFG system. Apparently nobody is using it.
"I am sometimes a bit surprised about how conservative MMOG players are, having problems accepting changes to the interface, even if they are to the better. I would say that new LFG system is quite good, especially in combination with the new functionality of the meeting stones to teleport. You can now easily find somebody for a dungeon group, regardless of their current location, and teleport them to the dungeon instantly, if at least two group members are already there. That should be a lot more popular than it is. I just hope that the expected popularity of the new Burning Crusade dungeons will break the ice."