At least debconf has a lot of Perl modules, but unfortunately, the Debian developers deem these not fit for release on CPAN, as they are Debian specific... I can't gather any callbacks back to apt-get though.

More googling returns apt-dialog, some Tk frontend for apt and apt-src, supposedly an apt library with an interface from Perl.

perl -MHTTP::Daemon -MHTTP::Response -MLWP::Simple -e ' ;    # The  
$d = new HTTP::Daemon and fork and getprint $d->url and exit;#spider
($c = $d->accept())->get_request(); $c->send_response( new   #in the
HTTP::Response(200,$_,$_,qq(Just another Perl hacker\n))); ' #  web
[download]