Facebook gave some examples of what can be done. If you want to know where surfers in Laguna Beach go for coffee, what TV shows doctors like, or the music preferences of Mitt Romney's fans, there is now a way to do that. But you have to get in — you have to "friend" these other accounts —to get something out.
What this tells me is that suspicion of Facebook, the tendency to seek privacy from sharing of data with other users, is as much a target here as anything. While this doesn't impact Google directly, it does so indirectly by giving Facebook users a feature Google Plus, that company's social network, doesn't have. Yet.
Facebook credited two ex-Googlers, Lars Rasmussen and Tom Stocky, with leading its KGS team, as noted on Techcrunch.
If there is a "Google killer" in all this, it is that searches that don't get answered by KGS will go instead to Microsoft's Bing. The late Steve Jobs used to save his key announcement for the end of a press conference, introducing it as "one more thing." Bing was this announcement's one more thing.
For now, the new feature is said to be in "limited beta," only offered in English, and on a subset of Facebook's data. It should roll out across other languages and the whole Facebook data set throughout the year.
Advertisers will race to get "liked" by Facebook users so they can participate in this. But how many Facebook users.
You can build a feature like this, in other words, but creating value from it requires training people to use it, and getting people to sign up for it. That will follow what I call "Moore's Law of Training," which states that there is no Moore's Law of Training. People learn, in other words, only as fast as they learn. They adapt to new things only as fast as they adapt, and everyone does so at different rates.
So what happens now? People who love Facebook are going to love KGS. People who don't love Facebook won't get as much from it. This separates the Facebook lovers from other users, in terms of the value they get from the service, so Facebook's numbers are bound to get more honest.
As with everything else, social is moving into its consolidation phase. There will be far fewer social networking companies at the end of this year than there are now, and the venture capital window has long since closed. Facebook is going to be one of those survivors. How much is that worth to you?