So far, I've heard of the following current or planned uses for TAPx::Parser.
It's only been available for a few months, it's not complete, it's still in alpha and yet tons of people are crawling out of the woodwork wanting custom testing tools. I'm shocked. I really thought that some folks would find this useful, but the barrage of communication I've received (to Perl-QA, emailed directly and one-on-one conversations) has shown me that the Perl community is crying out for testing tools on par with other languages.
Of course, my pimping it out every other day has probably helped.