Yes, that's right, WebPerl can now load either Perl 5, Perl 6, or both! See http://webperl.zero-g.net/perl6.html. This is thanks to the great work on Rakudo.js and 6Pad by Paweł Murias.
This is experimental and currently works by patching a local copy of WebPerl, and it only works in Google Chrome (because Rakudo.js needs BigInt support). I've tried to explain things in the above link, let me know if you have questions.
(If you want to see some real Frankenstein type stuff: experiments/p6/test6.html - FrankenPerl? :-) )