The Dow provides an unpredictable (if you can predict it, you probably have other things to deal with) random seed that determines a location inside of a consis

The Dow provides an unpredictable (if you can predict it, you probably have other things to deal with) random seed that determines a location inside of a consistent geographic region. For example, here is today's location in the East Bay area: http://irc.peeron.com/xkcd/map/map.html?date=2008-05-21&lat=37&long=-122&zoom=9&abs=1 http://irc.peeron.com/xkcd/map/map.html?date=2008-05-21&... This allows for unpredictable, spontaneous meet ups of like minded folks.