Apart from all the documentation... I'm not a 'sixer' but found this stuff and have used it to learn most of the language features I care about and have used.
http://perlcabal.org/syn/S21.html <- native call synopsis
http://doc.perl6.org <- perldoc/javadoc core api equivalent
I really don't understand the frequency of snide anon monk around Perl6 posts. If you don't get off on all the stuff in 6 land just ignore it. Why take epic dumps on everyone else's parade? There are users we just aren't fanatical. This is my first post on perlmonks for example. I've used Perl5 for more than a decade... I'm just tired of seeing nay saying and bickering rather than excitement. Someone tells you there are some cool concurrency features in a perlesk language. This is exciting not the end of the world.