Well, that didn't take long (thank god)!

Today Valve confirms the previous rumors of Portal 2 DLC. The awesome PR team at Valve just gave us word that the first DLC Pack 'first game add-o....is in development and targeted for this summer'.

Well, two good statements there, one, we get DLC and two, we will get more than one.

You can expect a bunch of cool new stuff for Portal 2's single and multiplayer modes:

Portal 2 DLC #1 will offer new test chambers for players, leaderboards, challenge mode for single and multiplayer modes, and more.