There's a new version of libwww-perl out that was required by another program that I'm using (xmltv). So I just copied libwww-perl-5.64.ebuild to libwww-perl-5.66.ebuild and merged it in with no problems.
*** Bug 13045 has been marked as a duplicate of this bug. ***
libwww-perl-5.8 is now in portage. 5.66 was pulled upstream and replaced with the newer version. Enjoy