You can get the SheevaPlug DevKit for $99 (http://www.globalscaletechnologies.com/p-22-sheevaplug-dev-k...). As far as the software they're using, it's not available yet but will be GPL (source: http://theplugbot.com/about).

looks like a sheevaplug...

http://www.plugcomputer.org/

then just install debian and compile whatever script^H^H^H^H^H^Hpenetration test tools you need.

The hardware is not what's unique about this project. Look at the overview:

http://theplugbot.com/assets/PlugBot_Overview.pdf

This involves a web server component with a reporting interface and some method of proxying "command packages" between the operator and the plug, which resides behind a firewall.

It just looks like a regular Sheevaplug: http://en.wikipedia.org/wiki/SheevaPlug