The relationship between Luke and John's Gospels.

Jim highlights an intriguing and pithy article on the suggestion that Luke's gospel made use of a Johanine oral tradition and used it over and against the Markan tradition.  Strong stuff.  I once asked a Luke scholar about the relationship and she told me forthrightly that it was a Johanine scholar's problem, not hers.  I thought at the time that was a little presumptious and I think this article shows rather nicely that the boot could well need to be on the other scholar's foot after all!