Just a disclaimer, I have not read the book and I probably will not in the near future for time reasons. But there has been a raging debate about the book, universalism, heaven, hell, etc. even before the book appeared.
It started with Rob Bell's introduction video spot.
Kevin DeYoung has responded to the book with a lengthy critique.
Now, Rob Bell has been interviewed by Martin Bashir on MSNBC who does not throw any softballs. The difficult questions keep flying.
And here are Ben Witherington's comments on the interview.