I can't wait for the expansion to hit, but before it does I have a question. Once I get WotLK how do I get my character to Northrend?

I share your excitement for WotLK and thanks for asking a great question. As you may already know there are 2 starting areas you can choose from in Northrend: Howling Fjord and Borean Tundra.

For Alliance:

Borean Tundra - Take the boat at the northernmost dock in Stormwind Harbor.

Howling Fjord - Take the boat at Menethil Harbor in the Wetlands.

For Horde:

Borean Tundra - Take the zeppelin in Orgrimmar.

Howling Fjord - Take the zeppelin outside of Undercity.

Pretty simple, or you could just do what a lot of people will do and follow the masses of people to these locations.