This module (reformed-perl) providesw a whole bundle of OO syntax goodness for perl 5.

Personal favourites:

Sub args in definition (which is normally not possible in Perl due to lazy evaluation):

    sub method($foo, $bar)
    {
        print "First param: $foo";
        print "Second param: $bar";
    }

Implicit self, class and base:

    sub method
    {
        self->instance_method();
        class->static_method();
        base->super_class_method();
    }

Ability to override default setters (accessed by clients like a normal object hash value):

    fields foo;

    sub get_foo
    {
        print "Getting foo!";
        return self->{foo};
    }

    sub set_foo($value)
    {
        print "Setting foo!";
        self->{foo} = $value;
    }

Of course it's non-standard, but if it got adopted into, say, perl 5.9 then it could rock the Kazbah. Whatever that means.