I run it on an old rig, 700mhz, 1GB RAM, 10GB HD, 100mb/s NIC. I have my torrentbox/webserver running 24/7, lots of other computers, and two wireless routers. The traffic shaping is really nice, along with time-based firewall rules. Its also setup to use dyndns.org so I don't have to remember what my home IP address is to administer my server and ssh into my boxes. I plan on building a cluster sometime in the future so it will support that too. Untangle refused to install on it, but I get the feeling its pretty bloated anyway.