No, they are going to simply give them HD MPEG4 capable receivers and DVRs (like the R22) that are locked to only output SD resolution video..
DirecTV doesn't have to maintain SD satellite feeds to keep SD customers. Just like what all the major OTA networks will be doing after February 2009, DirecTV will eventually only provide a way for SD customers to view their HD signals on SD TVs instead of providing both SD and HD feeds.
No RF connection on these either, there goes that theory......
Locals on the 72.5 will be shufflled to MPEG4 eventually and they will need a solution for receiving them. That's all this is about at this point. Sometime in the future they "may" have the ability to be upgraded to HD. I still want an answer as to wether or not the AM21 will work withg these in SD mode, and also if they are going to restrict the HD access. If not I am considering a "good sized" external eSata drive.