The cloud on a Plug? - Cool things to do on a Debian Server

Can we cram a server onto a plug? The traditional big-fat-loud server now has some competition - the plug computer!
Alishams Hassam will talk about the different types of software one can use to do document/file sharing, task and calender tracking, web server (apache or ngnx), why not to do e-mail, Quassel (client/server irc client), distcc, and routing/firewall with Shorewall (or tools other than raw iptables commands and a script at boot). Ali will show us what he's done with a big fat server, not having to worry about things like limited RAM or CPU.