More options for site visibility is a good thing: Facebook Launches ‘Send’ Button For More Selective Sharing, Announces 50 Million ‘Groups’
“Site designers are groaning right now (they have yet another sharing widget to integrate)”
That sounds like wild and wrong guessing, as that’s a very small price to pay for increased visibility.
Here it is anyway: Send Button – Facebook Developers
I wonder why this is not a threat to Quora, Yahoo! Answers etc, as it should be: Facebook Relaunches Questions- No Threat To Quora, More Emphasis On Friends