Will,
Right now, we don't have a specific timeline for a release. Earlier this year, we lost 3 members of our already small team, and we have too many things that were left unfinished and that need to be cleaned up. For the time being, please get the latest version from the PAPI git master branch.
Sorry for any inconvenience!
Thanks,
Heike
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Heike Jagode, Ph.D., Research Asst. Professor
Innovative Computing Laboratory, University of Tennessee Knoxville
http://icl.utk.edu/~jagode/