The truth is after my previous journal entry I went on to write a program that just takes the output of UNIX find.
Contrary to popular belief, I did not conclude that File::Find::Rule was dead!!! Nothing of the sort! I saw the date, and thought "That looks odd," and decided to ask. And provoked a great little discussion to come back to, in the process.
I actually wondered if the truth wasn't "The module is doing so well nobody's seen a need to update it since then." But I also thought it was entirely possible that work had carried on under a different name, much as WWW::Mechanize took off from its predecessor module (whose name I don't even remember at this point, but whose author was Kirrily "skud" Robert, IIRC).
I am quite glad to see that ack's approach can be accessed through File::Next. I will probably look into that at some point.