Not true. http://www.gamespot.com/pages/forums/show_msgs.php?topic_id=27102710
Microsoft is not allowing banned xbox to connect to media center either. This isn't just about disabling the ability to game on xbox live. They are trying to kill the used xbox 360 market with this move.
I would think that the Hauppauge.com HD PVR http://www.hauppauge.com/site/products/data_hdpvr.html would do the trick, as long as you have a video card that supports component output.