Chief executive Eric Schmidt would not comment on the service this week but said "the world doesn't need a copy" of Facebook. The world might not need that, but what Google needs is a copy of the most advertiser-friendly parts of that and, as the Zynga investment shows, Google is keen to move in on one of the web's hottest - and most profitable - growing markets of casual gaming. As WSJ says, a Google offering would also be good news for developers worrying over over-dependence on Facebook.
It's not just developers that should be concerned with "over-dependence" on Facebook.