I am presently working through a dissertation on the topic of Matthean posteriority, which is an unusual take on this topic. The issue is in what order the Gospels were written, and who then borrowed from whom. Of the different permutations which scholars advance, rarely is Matthew placed last. This is an examination of the scholars who hold this position and the evidence they use to advance the argument. Interesting stuff!
Synoptic problem
Dr. Michael Burer is Assistant Professor of New Testament Studies at Dallas Theological Seminary. He is the assistant project director for the NET Bible and has contributed various studies to the bible.org site. His first book - A New Reader's Lexicon of the Greek New Testament, co-authored with Jeff Miller - was published Fall of 2008.