A good long while ago I completed a contract job to produce a thoroughly researched and argued case against the authenticity of the verses in Mark 16:9-20, which the mainstream consensus has long since rejected as an interpolation but fundamentalists keep trying to rescue. The final product has now finally been published at Errancy Wiki (which years ago also published a concise summary of my case for the historical contradiction regarding the date of Jesus' birth in Matthew and Luke: Luke vs. Matthew on the Year of Christ's Birth).
The new article is: Mark 16:9-20 as Forgery or Fabrication. Like the earlier article, which decisively proves the bible historically errant, this article decisively proves the bible textually errant. It's the most egregious and appalling case of doctoring the text of the New Testament on record. You may have often heard references to scholars having proved that the ending of Mark is an interpolation from manuscript and stylistic evidence. Well, if you are wondering exactly what that evidence is and how well it holds up, especially against any competent attempts to argue the contrary, this new article is for you. It is now the definitive treatment of the ending of Mark, being the most comprehensive summary of the evidence that I know. In fact when combined with the scholarship in its bibliography, it is the most complete treatment you'll ever find.
I discussed this issue of New Testament textual errancy in general (and the ending of Mark in particular) in a recent debate with J.P. Holding, a video of which the producers assure me will eventually become available online. I also plan to blog the case for two other interpolations (in the letters of Paul), which came up in that debate, adding even more material I chose not to present during the debate in order to open up time for other arguments.