Perl6 now has a notably improved entry point to find documentation. See the Official Perl 6 Documentation page. The center piece are the Synopsis documents, which form the specification for the language. A number of additional useful documents are now linked from here as well.
I'm personally been working on Perl6::Perl5::Differences, documenting things that seem like key differences as I learn the new language. Both pages are available in the pugs repository for anyone to improve.
I also updated the front page of feather, the Perl 6 Community Development Server to make it a better general Perl 6 resource as well.
In the process of this documentation work, I discovered there is already quit a lot of Perl6 information out there, but it's a bit fractured-- there's more to be done to create an excellent, sustainable central resource. I'm interested to experiment more with this new Perl6 wiki powered by SocialText. There's little information there now, but it looks especially friendly to use and work with.