WoWPorty is a program that can port you xD You must enter the coordinates and it will bring you there. But because of teleport nerfes on live servern you´ll be disconnected when you move, after being portet. (you can avoid this with mucking around with the Packet-Range and the Timestamp). But besides, you´ll be at the ported location after the disconnect (after reloging  ).
You can only teleport inside the continent you start. This means, if you are at the startinglocation of the orcs, you can teleport everywhere on kalimdor. The nightelf startingpoint and the GM-island belongs to kalimdor, while the draenei startingpoint belongs to Shattrath (BurningCrusade).