Most of these resources are listed in Parse::RecDescent::FAQ, which seems to be overlooked by even the most copious resource list in this thread! Curious.
One of the main reasons I felt compelled to compile this resource list is because at least one of the links in the Parse::RecDescent::FAQ is broken, namely, the very first resource listed: Craig's Parse::Recdescent Area. In tracking this down (now here: Using Parse::RecDescent), I also found the new (and in other cases updated) resources listed above.