The guys over Biblical StudiesOnline, have posted 3 lectures by James D. G. Dunn, that deal with the Historical Jesus.
Take a look at the 3 lectures. There’s lots to learn.
Lecture 1: “The First Faith”
[youtube http://www.youtube.com/watch?v=HUjgeSvDK1o&w=420&h=315])
Lecture 2: “Behind the Gospels”
[youtube http://www.youtube.com/watch?v=exMVhaRKeMQ&w=420&h=315])
Lecture 3: “The Characteristic Jesus”
[youtube http://www.youtube.com/watch?v=yVMaFTcuJV4&w=420&h=315]
