re: Google Mine Wants To Track Your Stuff
It might be me, but I just don't see a point in Google Mine. If I wanted to borrow something from a friend, chances are if I know him/her well enough, I would already know whether he/she has such an item in possession. Additionally, I am not going to feel safe posting information about my own possessions, especially expensive ones, in case the info falls into the wrong hands.
And with a service like Amazon already in existence (and already having so much data on customers' possessions in order to suggest items to sell them), I don't see how users would find a need to go to Google Mine.