I appreciate the suggestions, but I'll respectfully decline. My '-c' and '-d' options work very differently from the '-k' and '-t' options in unix 'sort' (and I don't really want to implement the 'sort' style for these options), so I'd rather not confuse people by suggesting that they're the same thing. (Plus I have a few other utils for flat-table text data that use '-c' and/or '-d' the same way this script does.)
BTW, I checked out the App:: name space at the CPAN, and didn't find a lot of command line utils there. If I use the search term command line utility, I see more things that this script might group with, but they don't seem to be in a specific name space.
Oh well, having this up at PerlMonks (with a link on my home node) is good enough for me.