I found this fascinating lecture by Dr. Timothy McGrew, on the historicity of the four Gospels and Acts. (He's a philosophy professor at Western Michigan Univ. in Kalamazoo.) I don't think I can embed it here, but follow the link. You can either listen to the audio only, or hear it while viewing the corresponding slides. I'm sure none of us are in grave doubt about this topic, but his arguments are easily portable for apologetics, and his methodology is utterly sound. Quite a good lecture.
Merry Christmas to every blessing in the new year of grace 2012!