In what would be a big move for the company, Kara Swisher is reporting this morning that Silicon Valley luminary Marc Andreessen has been invited and has verbally agreed to join Facebook’s board of directors.

Andreessen, who co-founded Netscape in the 90′s, went on to found Loudcloud (later Opsware), and is now chairman of Ning, would become Facebook’s fourth board member, joining Accel’s Jim Breyer, Founders Fund’s Peter Thiel, and CEO Mark Zuckerberg. (Greylock’s David Sze is also a board observer.)

Facebook has been on a roll lately adding major new talent to the organization. The company has recruited Google’s Elliot Schrage and Sheryl Sandberg to join the front office within the last month.