The right place for patches to the perlfaq are perlfaq-workers@perl.org. However, in this case I'll just write the answer myself and add it to the faq since I'm not only a perlfaq maintainer, but I'm also a PAUSE admin. :)

And, even as I post this, it is already committed to perlfaq7 and submitted to the CPAN and PAUSE FAQs.

Here's the answer:

How do I adopt or take over a module already on CPAN?

The easiest way to take over a module is to have the current module maintainer either make you a co-maintainer or transfer the module to you.

If you can't reach the author for some reason (e.g. email bounces), the PAUSE admins at modules@perl.org can help. The PAUSE admins treat each case individually.

1. Get a login for the Perl Authors Upload Server (PAUSE) if you don't already have one: http://pause.perl.org
2. Write to modules@perl.org explaining what you did to contact the current maintainer. The PAUSE admins will also try to reach the maintainer.
3. Post a public message in a heavily trafficed site announcing your intention to take over the module.
4. Wait a bit. The PAUSE admins don't want to act too quickly in case the current maintainer is on holiday. If there's no response to private communication or the public post, a PAUSE admin can transfer it to you.