Though I've been a TiVo user and a cable DVR (Scientific Atlanta) user for years and have recently moved over to DirecTV and a pair of HR20s, I confess ignorance as to one feature many users on this site declare their strong desires for: dual live buffers. What exactly are dual live buffers and how would I use them? I gather it'd be something like flipping back and forth between two channels and keeping both of them in the buffer as I've always been able to do with a single channel on all my DVRs. Is that it? Why would that be so important? Can someone tell me how they would use it and why? Maybe I'm just confused because I watch so little "live" TV anymore, preferring to record almost everything I have an interest in watching and viewing it later at my convenience. Thanks in advance for your help in demystifying this issue for me!