This software fills the same niche that something like HAProxy or apache virtual hosts fills right now. Bouncy is great for when you have services on your internal network or on different ports and you want to map them to subdomains.

Different thing, no?

This seems to redirect locally. It seems to be more of a dynamic port redirection (the article could've been a little clearer..).

You wouldn't use SSH to redirect stuff from port x on localhost to port y and you couldn't do it dynamically (unless you'd like to spawn ssh for each connection, setting up -L according to header information in the request).