The Official Forums for World of Warcraft had a thread concerning free server transfers from some apparently overpopulated PvP servers to a new server. Now generally having a lot of people on a PvP server is a good thing, so unless you guys are crashing zones or creating large queues, this seems a little unusual. This is for a limited time only so be sure to check out the thread and get your request in.

The full list of servers can be found over at the Official WoW Forums.

Source: WoW Vault