In case you don't read the Perl QA list, there's a development version of TAPx::Parser available on the CPAN. It has a huge number of new features (mostly the test harness and the new runtests utility, including:
See the example/README and the Changes file for a decent idea of what you can do with this new release. I think it's finally at the point where I can switch to this rather than rely on prove and Test::Harness.
If it passes tests on your system, would you please post your OS and version of Perl for me?