Off Topic: Game Mag Says Black Xbox 360 Is Coming
There's an editor's note on the original article page that confirms this rumor as true. Here's what Brian Ashcraft at Kotaku had to say:
Always get an iffy feeling posting black Xbox 360 stories — Especially
ones that pop up in April. Yes, we know that the debug unit is black.
And yet, the rumor continues to surface. This month's Game Informer
says that a black Xbox 360 with larger 120GB hard drive, HDMI output
and an HDMI cable will retail for approximately US $479. It does not
include HD-DVD playback. A well-placed source at Microsoft tells GI
that the reason is because the "format's not proven." Then again,
neither is this rumor. And if this is in fact an April Fool's Joke,
we've got two words: Not funny.

Source:
Kotaku