It's no secret that Facebook has had many suitors. So far, the company has remained fiercely independent, insisting that it isn't in the market to be acquired. However, a Wall Street Journal report today indicates otherwise. In the story, Microsoft is said to be in talks to make an investment in Facebook that could value the social network at more than $10 billion.

If true, the talks could add heat to Microsoft's growing rivalry with Google, which has wavered on its Facebook position. At times, the search giant has been reported to be interested in a Facebook acquisition, while the official line from Google has been that they two companies are only interested in strategic partnerships. 

Officials at Facebook and Microsoft were unwilling to confirm rumors of any talks. The WSJ report claims that sources close to both parties say the talks are "preliminary."