Last night when I was going through some Raspberry Pi stuff, I happened upon two Pentesting packages for the RPi:
http://sourceforge.net/projects/pwnpi/
http://pwnpi.net/
http://blog.pwnieexpress.com/post/24967860602/raspberry-pwn-a-pentesting-release-for-the-raspberry
https://github.com/pwnieexpress/Raspberry-Pwn
The first two urls are for the PwnPi distro which is self contained, the second url being the home page. The next two urls are for PwnieExpress which you have to build from the Debian Weezy distro (at http://www.raspberrypi.org/downloads). The instructions are at the github address to set it up.
This would be a good chance to try out a different use for the RPi and at the same time get some background info for the CEH which I have been studying for.