Um. I'm not sure it's such a great idea after all. I mean, HSS is awesome for prototyping but after several months of extensive testing I'm much less inclined to put it in production, preforking or not. Anyway, it's easy enough to setup reverse proxy scenario with a bona fide HTTP server even for prototyping, so what's the reason for adding SSL and stuff?
Besides, Plack is the way to go these days. It's not an ideal solution but it's near enough so the only reason for avoiding it I see is compatibility to Perl versions older than 5.8. YMMV though.