Anyhow given her job of "Sandberg oversees Facebook’s business operations including sales, marketing, business development, legal, human resources, public policy and communications. " and the good words zucker has said about her, then why is it she is only now being made a director? Makes you wonder what the other directors had to do for there roles and if there was anything left for them to do with her onboard already!
The board is founder controlled. Sheryl Sandberg is heavily invested with the founder. Adding her to the board further cements his position and gets PR points for having a woman on the board (which many boards don't have).
I have no opinion as to whether or not this is a good or bad thing - but that's what I see from my more or less limited view point.
So, the only interesting part of this is the timing - why now, several weeks after the IPO?
Personally I think the board's role should be to provide some measure of skepticism to the company's direction. This seems like putting just another yes man on a board without any teeth. So another way to look at this is why put Sheryl on the board at all?
In February, California State Teacher's Retirement System's Director of Corporate Governance wrote a letter to Mr. Zuckerberg saying, "We are disappointed that Facebook's board will not have any women."