USB 1.1 (12 Mb/sec or so) would be like transferring in real time. Dish is not going to write the software, either. You could record to 4GB (2 hours of SD quality) DVD to have a permanent copy, a lot of manual tending. Better to start a new set of recordings, preferably in HD, with the 722 and multiple EHDs, 750GB or more each--think 200 DVDs.
-Ken