In doing the builtins, I just named the file "Builtins.p6m" without thinking. In retrospect, I think it would be nice to have a file extension *in addition to* ".pm" that is unambiguously Perl 6. "p6m" would seem obvious. This way, you can have your own module's Foo.pm and Foo.p6m side-by-side while you're transitioning, and Makefile.PL can know which one to install based on which version of Perl is executing it.
This is all getting WAY ahead of the game, but I thought I'd bring it up since I just stepped in it :)
