See
http://www.rakudo.org/announce/rakudo-star/2010.07
for how to get Rakudo Star, a a useful, usable, "early adopter"
distribution of Perl 6.
I installed it on Red Hat 5 Linux and ran a 'hello, world' program
without problems.
I plan to try Perl 6 first when writing all new software and only
revert to Perl 5 if necessary.
-mark