The power of this app is remarkable -- imagine reconnecting with people you haven't seen in years because they happen to walk nearby you. If/when Highlight achieves critical mass, this will happen. The good news is the Highlight has a virality model that's smart -- it leverages your existing Facebook graph, and has an "Invite All" button to get your friends using it. There's a natural incentive for you to want to invite your friends because you want to know if they're around. This "natural" virality has made Highlight explode in popularity in just a short period of time.
I had my first Highlight meeting today. Someone who walked nearby and noticed me sent a message out of the blue asking to have coffee. I had some spare time, and was curious, so I agreed to meet him at a nearby coffee shop in downtown San Francisco. It turns out he was an entrepreneur too, from Montreal. I had just spoken at a startup conference in Montreal and so there was an immediate connection. He told me about his company -- he had grown it to $3.2m in revenue, was profitable, but didn't know how to raise money to fuel his growth. He was looking for a new CEO too.
For fun, I connect entrepreneurs with each other (and to investors) and so I was more than happy to help him. We're following up afterwards. Thanks to Highlight, he may well be on his way to taking his company to the next level, and I made a new friend :)