http://venturehacks.com/articles/one-way-control
http://venturehacks.com/articles/board-structure
One general note... Look how many recent news articles you can find when you search for the board firing founders on Google. https://www.google.com/#sclient=psy-ab&q=board+firing+founde...
It's not scientific, but it highlights that friendly relationships can go awry.
Is that really the case? It contradicts what I've heard.