Is there a tentative release date for ParMetis4.0..? (I noticed the inclusion of ParMetis4.0 in the issue tracker).

RE: There will be a new 3.1.2

There will be a new 3.1.2 release sometime next month incorporating some recent improvements in parallel ordering. After that, Metis 5.0 will be released, followed by ParMetis 4.0. My plans are to finalize those two releases around the holidays.