This version has been in the tree for almost 3 months. It uses the new ruby-ng eclass and as such it is going to be a dependency for pretty much every ruby-ng based ruby ebuild that we want to stabilize. Functionally there are no differences with the currently-stable 0.8.7 apart from fixed bash-completion.
x86 stable
ppc stable
alpha/ia64/sparc stable
Stable for HPPA.
ppc64 stable
amd64 stable, all arches done.