I have never seen so many iPhones in my life. Scott and I are keeping informal tallies for today (trying not to duplicate in our individual counts). It is about 11AM and I have seen 8.
Update (3:30PM same day): I have seen 54 so far and Scott has seen 68. We are getting to the point where we needed some type of tagging system to avoid duplicates. We are working on this (e.g., numbered ear tags, ultraviolet paint balls or RFID stickers ).