JG, I was looking around the various links to your above link and found this regarding Warren's teachings:
Warren says that if Christians fail in their duty to evangelize, “there will be people who are not in heaven who should have been there.†To claim that some people will end up in eternal torment because of the failure of other people is shocking! To imply that the Lord will not be able to save some people who “should have been†in heaven is blasphemous. I do not know if Mr. Warren realizes the implications of this statement, but a few moments of serious reflection will convince any thinking Christian that this presents a seriously distorted view of God. This view cannot be squared with Scripture and is as dangerous as it is erroneous.
BINGO! This was one of the very concepts that I was struggling with so much during the study of this book. You know what my main problem was during that study: I wasn't on the Internet then! Really. I just had this gut feeling, by picking up on certain things like the above, and the others in the study, all Christians, and some a lot smarter than me, were really promoting the book. I just didn't have any frame of reference to counter some of the stuff discussed during the study.
What is so true about Warren is this phrase right here: to imply. That's it. It's not so much of what Warren said in the Purpose Driven Life, but the implications of it, and the taking of some of what he said and extrapolating it out to it's natural consequenses.