Once [Ruan] over at AndroidClone heard that Android devices were capable of running a full Linux environment, he started contemplating all of the things he might be able to do with a full Linux OS in his pocket.
He decided that a portable penetration testing platform would be great to have on hand, so he got busy installing Ubuntu 10.10 on his Lenovo LePhone. Once he had it up and running, he stripped out all of the unnecessary fluff and added some common tools such as Wireshark, Nmap, and Kismet, among others. He says it easily runs side by side with Android, allowing you to switch between the Ubuntu install and your standard Android applications with ease.
While this all started out as a proof of concept, he has continued to refine the project, releasing several new versions along the way. If you are interested in giving it a try, he has installation instructions available in the AndroidClone forums.