Nokia Buying a Piece of Facebook? is talking up a rumor that has Nokia mulling a stake in Facebook. According to the site, the deal, if it happens, would promote the social networking service on the screens of countless Nokia handsets around the world.

This wouldn’t be Nokia’s first foray into social networking. Last year it unveiled its Mosh mobile social networking site, which is part of the handset giant’s Ovi portfolio of mobile services.

Facebook launched a mobile version specifically for BlackBerry users in October of last year.