I don't have ActivePerl installed here but I guess that's there in the AP distribution.

I have three Win32 ActivePerl versions: 638 (perl-5.6.1), 802 (perl-5.8.0), and 815 (perl-5.8.7), and none have the Env::Array module. Probably the Env::Array documentation is there for the benefit of users of older ActivePerls before the module became obsolete.

Can we take this (and probably similar) modules from the ActivePerl distro and upload to CPAN? Should we?

Unless there's an explicit copyright statement accompanying the module, it would probably be a good idea to ask ActiveState about this. As ActivePerl for some time has been built from the standard Perl sources and CPAN modules, probably the only modules in ActivePerl that would be of general interest that aren't already on CPAN are PPM (Programmer's Package Manager, v 3) modules and the ActivePerl DocTools used to build and maintain HTML documentation. However, my understanding is that these particular modules aren't available for distribution outside of ActivePerl.