It aggregates the data from various sources and makes an attempt to present it neatly, but results-wise it's nothing special. People who wanted to be found (e.g. with blogs, Facebook, Linked In accounts, etc) were found, while all others were not or they were buried in a lot of noise. As such it is marginally more convenient than regular googling and nothing to lose the pants over.

If it were able to understand that this guy here is the same guy as that guy over there going by the account nickname, and then link both to an actual person, then - yeah - that'd be interesting, very interesting.