This is really cool. It has saved us quite a bit of frustration.
http://www.linux.com/feature/60098
The short of it is that it takes a file and sets it up for download via an http connection.
It really came in useful earlier when we had a Linux, Windows, and Mac systems that were being difficult in sharing files with each other. The Windows system could share a folder that the Linux system via Samba could see and a Mac OSX that we could connect to Linux via SSH but that was about it. So we put all the files on the Linux system, and I was able to share the folder with all systems with woof. Made it super simple to share folders with everyone. No difficult settings, no package installs on every system, and even better is that it doesn't leave a service running. It is just start, download, and be done with it!
Anyway, thought others might find this useful.
Have Fun!
~S~