It is not clear that he was dumped. And while I am certain that there were people in his church that wanted him fired, the board of elders did not say he was fired.
Below is a pretty good analysis of the issues in his book. Yes it is controversial and goes beyond what many people believe about Hell, but he continues to deny that he ever said there was no Hell.
http://www.christianitytoday.com/ct/2011/marchweb-only/rob-bell-universalism.html?start=1
The article here makes it pretty clear there was a huge division, 3,000 people leaving means it was a pretty big problem. The quote from Bell's wife saying they could no longer be there confirms it was a pretty big problem.
I have seen similar situations where someone was fired, yet it was not stated as such by a church board; what I am reading is he was likely asked to leave and it's not being reported as such. No biggie, it happens sometimes.
Thanks for the link, I'll go take a look. I have appreciated at least one of his books in the past, but suspected he was heading towards a wrong (meaning untruthful) direction for a long time. I guess if we wait long enough, this will play out and we'll know. The idea of a TV show with the director of "Lost" is truly an odd one........