NEW BOOK: Who is This Son of Man?, noted by Larry Hurtado.
UPDATE: More from Larry: “The Son of Man”: Some Linguistic Observations.
I agree with his conclusions, although I would not rule out a direct connection with Daniel 7:13-14 in the mind of Jesus.
Another recent PaleoJudaica post involving Jesus and the Son of Man is here.
UPDATE (11 March): More here.
UPDATE (15 March): More here.