"He's an Israeli who sidestepped military service in favor of moving to the Bay Area to become Y Combinator's youngest founder. Six months later, all eyes are on Daniel Gross, as he has almost $5 million in funding backing his search engine, Greplin. Oh, and he didn’t go to college." (from www.inc.com)
I was intrigued. The headline was even more preposterous: "How a 19-year-old earned $5 Million to Revolutionize Search" (alternatively to 'Take on Google'. Well he didn't earn $5 Million, right, it was funding. Also while a cool product, I highly doubt it is going to revolutionize search or take on google.
From what I can see, Greplin, searches through all of my 'password protected' web sites, for example, LinkedIn, Facebook, DropBox and so on. It's very simple and just works. I am not ready to declare it life changing because I don't know yet how often I actually need to search there, but still, a very interesting product. I would check it out!