The Perl RDF project hopes to address these issues:
Please subscribe to the perlrdf mailing-list and get in touch! There is also an IRC channel.
The rest is coming soon... Meanwhile, here is a list of Perl RDF packages on CPAN:
RDF::Helper - Provide a consistent, Perlish interface to Perl's varous RDF processing tools
RDF::Query - SPARQL query engine based on RDF::Trine, RDF::Redland or RDF::Core
RDF::RDFa::Parser - RDFa parser using XML::LibXML
RDF::Redland - RDF triplestore and query engine based on the Redland C library
RDF::Scutter - Web crawler for harvesting distributed RDF resources
RDF::Trine - RDF parsers, serializers, triplestore (primarily based on DBI)
RDF::Core - RDF triplestore (postgresql, DB_File, and in-memory), RDF/XML parser and serializer