uhhh, the source for that N4G article is from that Xboxoz site....and that had already been debunked......
Original rumor: http://xboxoz360.wordpress.com/2008/07/22/bioware-mass-effect-trilogy-exclusive-to-360-mass-effect-2-in-09/
X3Fs write up: http://www.xbox360fanboy.com/2008/07/22/rumor-mass-effect-trilogy-exclusive-to-the-xbox-360 (note that they sourced Xboxoz)
Debunking: http://www.joystiq.com/2008/07/22/bioware-has-never-confirmed-any-plans-for-mass-effect-360-excl/