RFC on Coexistance and simulaneous use of multiple module versions?

[Garrett Goebel]

Discussion of RFC 271 and 194 on pre and post handlers for subroutines
reminded me of Larry's desire for Perl 6 to support the coexistance of
different versions of modules.

Besides http://dev.perl.org/rfc/78.pod, are there any RFC's which directly
or indirectly relate to this?