An idea that came to my mind watching the keynote was that, by covering upcoming concerts, Ping could become a rather powerful way of not only notifying users o

An idea that came to my mind watching the keynote was that, by covering upcoming concerts, Ping could become a rather powerful way of not only notifying users of upcoming concerts, but also allowing them to buy tickets. Apple would, of course, have to work out some arrangement with the ticket conglomerates; considering the potential market I cannot imagine this would be much of a barrier. Imagine opening iTunes and being informed of the upcoming concerts in your area based on your listening preferences, or your friends' preferences, or even being notified that your friend is attending a concert and, hey, want to buy a ticket? In my eye, a ticket buying feature like this would be the most game changing in the long run.