I attended SBL (Society of Biblical Literature) last weekend, and listened to a talk by Bart Ehrman, the darling of the New Atheist crowd. He said he has a new book coming out in March 2012 (with HarperOne I believe), Did Jesus Exist? on the Jesus-Myth theory. (I also heard that it will be an ebook only.)
Basically he is going to argue that the Jesus-Myth theory–that Jesus never existed and was fictionally cobbled together from myths and legends–is a bunch of bogus nonsense.
There was also a paper presented by Brent Landau (U. Oklahoma), “Jesus Never Existed”: An Intellectual History of the Jesus-Myth Thesis which also debunked the Jesus-Myth. He said that, as far as he is aware, no one has ever presented a paper at SBL advocating the theory. He said it is a pseudo-scholarly fringe movement recently popularized by the New Atheist crowd.