What is a "non-theistic" Christian? The comments to this response suggest that there is such a thing as a Christian who does not believe in God. To me, that is rather contradictory, sort of like social networking without all of the people.

So... 


how does it work? 


What are the major authors? 
Do they have a denomination?

Are there any statistics related to them? (How many, location mostly)
First, define a Christian ;p It actually isn't as simple as you'd think - for example, consider the definition this site uses:


  As far as the scope of this site is concerned, any group that identifies themselves as Christian are to be considered on-topic and allowed to label themselves Christian.


You would perhaps need to ask the author, but "cultural Christians" may be one answer; for example, the recent results of a UK MORI (i.e. well-respected/independent survey) of only people who self-identified as Christian showed that 65% are actually non-religious cultural Christians, i.e. identify as Christian for reasons such as "was Christened as a child", "parents are Christian", etc. Likewise, only 10% used religion as a primary tool in morality issues. Summary document - but emphasis: while the survey was commissioned by the Dawkins Foundation, the survery was conducted independently paying scrupulous attention to the actual questions to ensure the questions weren't leading, etc.

I can't know whether this relates to the thoughts of the answer you are thinking of, but that number is pretty telling, particularly when interpreting geographic religion statistics - i.e. how people identify might not actually relate much to their religious beliefs, but more to their historic/cultural identity.