If this "rumor" about the 211 or 222 being upgradeable to a DVR in the future is true, then it just may be time to decomission the old 508 - which I picked up for cheap at Dishstore.net about 3 years ago. Thanks again, Scott and Claude, it has been a great DVR, but it is just about time to move on. The TV it is connected to is HD and all we have been able to watch on it so far is SD. We have a 622 on the main set now but can't justify getting another one for the bedroom.
As an aside, it would be AWESOME if the new version of the PocketDish could also read external HDs that were recorded on by a home DVR. It could be the centerpiece of a mobile DVR solution if connected to a vehicle-mounted video unit.