Books and Book Chapters
Using MPI by William Gropp, Ewing Lusk, and Anthony Skjellum, MIT Press, 1994, 2/e 1999.
Parallel Programming Using C++ Gregory V. Wilson and Paul Lu, eds; MIT Press, 1995. Chapter on 'MPI++'
Parallel Computing Works! by G. Fox, R. Williams, and P. Messina, Morgan-Kaufmann, 1993; Chapter 16, and parts of Chapter 9.
Standards Documents
DRI 1.0 Standard (Nearly Completed, but current doc still rough)
MPI-1.0 Standard
MPI-1.1 Standard
MPI-2.0 Standard
MPI/RT 1.0 Standard
MPI/RT 1.1 Standard
Papers
Papers about Message Passing for Parallel Computing
Papers about Myrinet Software
Papers and Talks about MPI/RT
Papers and Talks about MPI/FT
Papers about Mathematical Libraries and Algorithms
Papers and Talks about Applications