Who the heck are these people? Highlight's social overload  Too
many people, too little privacy: new location-aware friend
finder breaks privacy norms.  I don't know you, but I know where
you are. Screenshot by Rafe Needleman/CNET    Unlike Foursquare
or Facebook, it works without requiring check-in, which is what
makes it cool. The serendipity factor is just through the roof.
It'll tell you if a person you know (that is, a Facebook friend)
is in the coffee shop where you are standing in line. That's
assuming they are also a Highlight user. Which, if they're a
geek in the Bay Area or at SXSW, is pretty safe bet. This thing
is taking off.  As Robert Scoble says, you can tell this app is
important, because it's already winning a bunch of haters. And
for good reasons. In fact, I have two.  I've been using the app
for barely 48 hours here in San Francisco, and already I'm
overwhelmed with alerts from it, because Highlight seems to be
designed to help you connect with people you don't know just
yet: your Facebook