Use a 64bit OS with 32bit Perl, because Perl is not fully supported in its 64bit version.
I think Perl should spend more time getting a fully working 64bit version with supporting modules instead of working on the future of Perl 6 in 32bit.
If we figure when Perl 6 will be released for main stream use then what bit the OS's will be 96bit or 128bit? Sounds like Perl 6 has a lot of its time waisted as a 32bit version