the publication date for the book is given as May 2009 http://www.cambridge.org/catalogue/catalogue.asp?isbn=9780521860451 the list of contributors is C. Rovelli, G ‘t Hooft, R. Sorkin, J. Stachel, N. Savvidou, L. Crane, O. Dreyer, R. Percacci, F. Markopoulou, G. Horowitz, J. Polchinski, T. Banks, W. Taylor, T. Thiemann, E. Livine, A. Perez, L. Freidel, D. Oriti, J. Ambjørn, J. Jurkiewicz, R. Loll, R. Williams, R. Gambini, J. Pullin, J. Henson, G. Amelino-Camelia, C. Burgess, S. Majid, J. Kowalski-Glikman, F. Girelli, J. Collins, D. Sudarsky, L. Smolin there are 34 contributors including some very noteworthy ones Dan Oriti is the editor. He gets a lot of credit for bringing together people from highly diverse approaches to QG. Horowitz, Polchinski, Banks and Taylor are STRING Loll, Ambjorn, Jurkiewicz and Williams are TRIANGULATIONS (CDT and Regge calculus) Percacci is ASYMPTOTIC SAFETY Sorkin and Henson are CAUSAL SETS Rovelli, Thiemann, Livine, Perez, Freidel, Gambini and Pullin are LOOP that is just a sample, I know I am missing some. The title is Approaches to Quantum Gravity: Toward a New Understanding of Space, Time and Matter Now that Cambridge University Press has it in the catalog and has set a definite publication date we can be pretty confident the book is going to come out. I was wondering when I didn't hear anything about it for a while.