As I think everyone knows (or should know), the Gospels of Matthew and Luke used the gospel of Mark as one of their sources, plus some other material. Over at Irreducible Complexity (a great blog), Ian has an analysis of shared material across the synoptic gospels (as they are called), and I've commented on this before. At the time it struck me that a powerful way of analysing this material might be to approach it from the bioinformatic angle, and use the dot-plot technique to compare the source material.
Well, it's been done! John Lee (working at MIT at the time) has compared the gospels of Mark and Luke using this technique, and it makes for mighty interesting reading. Here's part of the skinny (excuse the clumsy screen grab!).
Now, I reckon you could do this for all the gospels, or even the whole bible. It would be interesting to see what would be thrown up, although I doubt it'll tell us much that we don't already know. For more information on what we do already know (pre dot-plot of course), I would strongly recommend Robin Lane Fox's excellent resource "The Unauthorised Version: Truth and Fiction in the Bible". If you can read that and remain an inerrantist, there is something VERY wrong with your brain. Or you don't really care about the truth.