http://www.lam-mpi.org/7.0/whatsnew.php Yep, it's out, and it needs to be in portage. I'll have at it in a few days if no one else does.
Woops, misassigned this. Reassigning to cluster@.
I had a look into it... Current version is 7.0.2 Just copy the newest ebuild in the tree to 7.0.2 and cut away --with-cflags and --with-cxxflags from econf to make it compile. When it installs it tries to mkdir /usr/share/lammpi which ends with an access violation.
Committed fixed version.