Well, folks who want to reroll the opposite faction can now do so with ease if they want to pay $30.
“This service lets you change a character’s faction from Alliance to Horde or from Horde to Alliance. A mandatory opposite-faction race change is part of the faction change process, and the full range of customization options offered by the Character Re-Customization service is included as well. Each faction change costs $30.00 USD.” Check your Account Management for this service.
Check out the official faction change FAQ for more info (or Blizzard Support FAQ).
“When a character changes factions, that character’s information including achievements, reputations, and items are automatically switched to those of their new faction when appropriate.”
I think a lot of people will go for this because they can switch (and wait 60 days) then just switch back with the goal of just changing the race of the original faction.
Q: When I change a character back to its original faction, can I select any new race?
A: Yes. As noted previously, though, you will only be able to select a race that is available to the character’s class.
Full Q&A can be found here