the PEM list has been totally quiet.
Well, now that MIME/PEM has been re-issued with a less contentious name,
and RSA is rolling its own representation for PKCS in MIME, there isn't
a lot to argue about. This leaves matters in the hands of the actual
implementors, who are busy writing code, waiting for ink to dry on licenses
and other agreements, and so forth :).
I suspect that for pragmatic reasons alone we'll be seeing support for
X.509v3 and PKCS extended certificates in products as time goes on.
--Amanda Walker