Moritz Lenz has written a series of informative blog posts about Perl 6, for Perl 5 programmers. Here’s a bit of his introduction:
Perl 6 is underdocumented. That’s no surprise, because (apart from the specification) writing a compiler for Perl 6 seems to be much more urgent than writing documentation that targets the user.
Unfortunately that means that it’s not easy to learn Perl 6, and that you have to have a profound interest in Perl 6 to actually find the motivation to learn it from the specification, IRC channels or from the test suite.
This project, which I’ll preliminary call “Perl 5 to 6″ (in lack of a better name) attempts to fill that gap with a series of short articles.