Network Beacon: share an iPhoto library across the internet

I think this is a front end for some basic BSD Unix functionality. It sounds interesting, one person uses it to share iPhoto libraries across the internet. I'm trying to learn more about it...

Welcome to Chaotic Software

... Network Beacon is a Mac OS X application that enables you to publish services on a computer or to serve as a proxy for services on other computers or devices. Network Beacon is distributed as freeware...

Update 3/9/09: Using NB to create SSH access tunnels.