I recently got a new Premiere-4 (upgraded from S2) and when I just opened up my Tivo Desktop, I expected it had my old S2 Media Key and I would have to change it to my new Premiere's key. But it said if I did, I couldn't watch the recordings in the Tivo Desktop -- so I didn't. I don't even know what the old Media Key was. Then I went into MyShows and was surely surprised to see my new Premiere's MyShows without me telling Tivo Desktop about my upgrade. So I guess Tivo Desktop communicates with the "mother ship" about me. I thought Tivo Desktop was just a local PC/Tivo thing on my LAN. So I transferred a current show to the desktop and it is fine. So is it right to conclude that the Media Access Key is tied to my account rather than a particular DVR? Also concerned how it works with transferring ownership of a Product Lifetime Series 2? Do they get their own Media Access Key? I just sold my Series 2, does it get a new key when the new owner sets it up? Please enlighten me.