Like two knights jostling for the hand of a fair maiden, both Facebook and Google appear to be courting the graces of Skype. A source close to Facebook recently told Reuters that CEO Mark Zuckerberg is thinking about buying Skype outright, as part of a deal that could be worth $3 to $4 billion. A second source, meanwhile, claimed that both Facebook and Google are more interested in forming a joint venture with the teleconferencing company, which has yet to issue an IPO. With discussions still in a nascent stage, both