I saw the node, I didn't answer it... but I'm sorry it got reaped... in mitigation of sorts, I offer the following

Web Test tools..

You can also try the (expensive!) mainstay of QA people, LoadRunner.. I do know that it has good automatic scripting capability (I loadtested some of my work on it recently)...<short aside>mod_perl rocks</short_aside>
For load tests, a free alternative is Velometer, a personal favourite of mine... or you can use the venerable ab, bundled with the Apache webserver...

While I was trawling around, I found this link, which I thought was interesting.. if you're not a QA person (I'm not), it makes for really informative reading...

Most of the links that I mentioned above don't really have anything to do with Perl, I'll be the first person to admit that :o) but from my personal experience, I've tested a lot of Perl applications using some of the tools... and I'd be happy to see someone else benefit from my hours of trawling the net trying to locate a free testing tool..I have to admit that the title of the root node touched a nerve... I've found Perlmonks to be much friendlier than any other online community, and I'd like to do my bit to see it remain so....

/me ceases the self-righteous chattering and walks off..