We are pleased to announce the beta release of OSHMPI-2.0 (version 2.0b1), a portable OpenSHMEM implementation on top of MPI. It contains several key features. http://www.mcs.anl.gov/project/oshmpi/downloads/ A list of features: - Full support of OpenSHMEM 1.4 specification. - Function inline for all OSHMPI internal routines. - Caching internal MPI communicators for collective operations with PE active set. - OpenSHMEM multithreading safety support. - Active message support of OpenSHMEM atomic operations. MPI accumulates cannot be directly used because MPI does not guarantee atomicity between different reduce operations. - Optional asynchronous progress thread support for active message based atomic. Details of each feature can be found in CHANGES (https://github.com/pmodels/oshmpi/blob/master/CHANGES). Regards, The OSHMPI Team