If you're a Horde player, a small but important addition to the way you travel is coming. A zeppelin that will ferry you between Thunder Bluff and Orgrimmar will be added in patch 3.2 Call of the Crusade. Here's a lovely YouTube video of the zeppelin in action.
Be warned this is a non-loading flight so you get to see the whole journey and can fall off when you see fit. Also be warned that if you're needing to go to Thunder Bluff to get on the zepp to Thunder Bluff not the one that takes you to Northrend!