A black Xbox 360?

On this Gamespot page, there is a Best Buy ad (You may not see it right away since there are a number of different ads, but if you refresh the page enough it should eventually show). It cycles through different gaming products, one of which is an Xbox 360. But the picture displayed is not what you would expect: It shows an all black 360. I captured a picture here:
And if that's not enough, the ad can also be seen here. This is only an ad and so doesn't mean too much, but why would they put a picture showing a black Xbox 360 if they aren't going to sell them? Plus, this is not the first time there have been these rumors. In the October issue of the Official Xbox Magazine, the "Rumor Mole" claims one of its "trusted sources" says there will be a "$600 dollar jet-black Xbox 360 with a built-in HD-DVD drive, an HDMI A/V port, a 250GB hard drive, and TiVo-like PVR functionality." I guess we'll just have to wait and see if this ever happens, but why else would the 360 in the ad be black?

[Via Xboxic]