The book New Studies in the Synoptic Problem. Oxford Conference, April 2008. Essays in Honour of Christopher M. Tuckett (eds P. Foster; A. Gregory; J.S. Kloppenborg & J. Verheyden; BETL 239; Leuven: Peeters, 2011) has now been published (at Euro 85 for a 961 page book which is not bad IMO). (For an earlier post on the conference see here, and also Dan Batovici's article ‘The Oxford Conference on the Synoptic Problem’ Currents in Biblical Research 7.2 (2009) 245-71 which is helpfully online).
My chapter, on 'Textual Criticism and the Synoptic Problem', can be found here. Other chapters of direct relevance to TC include Judy Lieu on 'Marcion and the Synoptic Problem' and Scott Brown on 'The Secret Gospel of Mark and the Synoptic Problem'. But all of them are interesting if you are interested in the Synoptic Problem (and who wouldn't be!).