You know you've been spending hours on Facebook. But it's not just you, the whole world has been doing it! According to Nielsen, unique global audience to social networking sites increased by 27%, from 242 million in December 2008 to 307.4 million in December 2009. On average, people are spending five hours, 35 minutes and five seconds on these sites. I guess our definition of face-to-face talking will soon change. Ping you later!