Perl alone does not a Pitbull make.
Well, not unless you're obsessed and masochistic. =D
Anyway, the answer is no. There aren't yet any command-line tools that will upload a file to a hotline server without wanting a tad of user interaction. Neither are there applescriptable hotline clients. If this has changed since I last checked, please, let me know. I could use a utility like curl which acts on Hotline servers, but for now, I have more enjoyable things to do than create one.