I see the point for non-programmer types, but I'm not very impressed, to be honest. If you know your way around the Unix toolset, such tasks will be more or less trivial even without Perl (and hardly any easier with it).

Maybe it's my bias showing here, but I despise GUIs for any sort of largescale data munging.

Another recommendation I can give you is to get to grips with Vim - it has so many and so powerful facilities to edit text (including a Perl binding in the recent version that enables you to let loose Perl commands on your text right inside your editor) that it can be used for just about any one-off data munging task that's relatively simple but too irregular to tackle with the usual tools.

Makeshifts last the longest.