Since Perl6 will treat any code as "old code" unless it starts with one of the new keywords, I'd suggest this site operate in that spirit. All code is Perl. Some is explicitly marked as being a new type of perl. Lack of such a mark indicates a compatibility with the old language.
Two technical helpers I'd propose:
--
[ e d @ h a l l e y . c c ]
| For: | Use: | ||
| & | & | ||
| < | < | ||
| > | > | ||
| [ | [ | ||
| ] | ] |