MPICH2 is implemented by Argonne National Laboratory.
The goals of MPICH2 are:
1. to provide an MPI implementation that efficiently supports different computation and communication platforms including commodity clusters (desktop systems, shared-memory systems, multicore architectures), high-speed networks (10Gigabit Ethernet, Inifinband, Myrinet, Quadrics) and proprietary high-end computing systems (Blue Gene, Cray, SiCortex).
2. to enable cutting-edge research in MPI through an easy-to-extend modular framework for other derived implemenations.

I would like to build mpich2 for suse 10.2 and 10.3