If the recent appearance of Conker: Live and Reloaded and Jade Empire screenshots on a Microsoft press FTP site are any indication, the two classic titles could be coming to Xbox Live Marketplace in the near future.
Folders and zipped screenshots for the two titles appeared on the FTP server this evening, which seems to be an obvious sign that they will soon be added to the current Xbox Original line-up. Like all of the other Xbox Original titles, both are already backwards compatible with the 360, and both can already be purchased at your local GameStop for under ten dollars.
Of course, once they (likely) hit the Xbox LIVE Marketplace, these babies will (likely) cost you 1200 MS Points ($15.00). We'll be sure to give you another heads up when Microsoft makes the official announcement, so just consider this a friendly warning from one friend to another.