I’d never seen this announcement. It was back in the day when Apple announced a partnership with Microsoft…it’s hilarious hearing the reactions from the Apple crowd:
http://www.youtube.com/watch?v=WxOp5mBY9IY

Found by the rumours here:
http://9to5mac.com/August-Aug-7-seventh-iMacs-Apple-Event-ipod-ipod-micro-nano-3450897543
 

which are about the new iMac, iPods etc..