The best place for this kind of questions is Cool Uses for Perl, as Popcorn Dave already said. If you want an opinion on your code, you should also post the code. Anyway, I downloaded your script and tried it... really cool!

IMHO, it will be very hard to mantain your code: you reinvented every wheel!!! If you really need to ship a single file, why don't you try with App::Packer or PAR, and use all the tools already available from CPAN? I'm thinking about libwww-perl, especially HTTP::Daemon and LWP::Simple::mirror, HTML::Parser, HTML::Template and so on...

HTH, Valerio