use Perl; – a Slashdot-style Perl news site http://use.perl.org/
Perldoc.com – after man pages, the first place to go for Perl documentation http://www.perldoc.com/
The Comprehensive Perl Archive Network (CPAN) – the definitive source for Perl code http://cpan.perl.org/
Collection of articles and links about Perl http://www.perl.org/
O’Reilly’s Perl books http://perl.oreilly.com/
Another good source of Perl articles and tips http://www.perl.com/