I gave myself a generous 3. Computers mac windows and windows on mac no problem. Linux for me is like those old maps that indicate unknown areas with the caution "here there be dragons".
I don't believe that you need to be that technologically proficient to use a iLiad but having said that I had to get my brother in law out to get me on my home wireless network with the thing.
I would love to be able to listen to mp3s on my iLiad but lack the ability to even start. All sorts of stuff unavailable to me I guess. My own field moves so rapidly that I lack the time and motivation to get involved with linux on an iLiad. Perhaps over Xmas I will give it a shot.
Thank goodness for all you clever chaps on this forum