From majornelson.com:

You may have heard last week that Microsoft is changing the outer finish of the Xbox 360 250GB consoles from a glossy black to a matte black finish, similar to the current Xbox 360 4GB model.

Some of the news outlets that covered it mentioned having a choice between matte and glossy Xbox 360s this holiday.

I wanted to set the record straight and let everyone know that that is not the case.

We are actively transitioning all our Xbox 360 S consoles to a matte finish. The consoles will start to arrive in stores over the coming weeks, so if you really love the idea of a glossy console don’t wait much longer.

Of course, we still may offer a gloss finish on Limited Edition consoles like the upcoming Gears of War 3 Console or the Star Wars Console, but if you have your eye on a glossy black console you don’t have much time left.
http://www.xbox-scene.com/xbox1data/...AyPpptJnvd.php