AllThingsD's Kara Swisher has a thoughtful story about Twitter's manly board, with one very money quote: it's been a problem for so long, they PG-13 joke about it.
The lack of a female director on its board even caused one board member to make a naughty joke that has been widely repeated inside the company — and forgive me in advance for this — that that Twitter’s governing body has to expand beyond “three Peters and a Dick.”
(Peter Fenton, Peter Currie, Peter Chernin, and Dick Costolo)
Kara! We forgive you. But will Twitter's future investors forgive the diversity dearth once the joint goes public? Of course. This all stops mattering to people as much once there's a lot of money to be made.