Hi,
> The source code to this one isn't available since part of it is based
> loosely on the TypeKey verification code from MovableType and I'm not
> allowed to distribute that.
You could actually use Authen::TypeKey instead, which is on CPAN, and which
is licensed under the same terms as Perl:
<http://search.cpan.org/~btrott/Authen-TypeKey-0.03/>
Ben