I like them all except for the fourth one, "Challenges At The Office", it made me cringe.
I found the "Challenges at the office" to be quite a good one. It was the only one from the nominees that explicitly showed that Linux will CUT YOUR BILLS TO THE GROUND. This is a very important aspect of Linux, especially in these times. I think I liked The Origin most, but yeah it's a bit too abstract for people who don't know what it's about.
-f I can see, but -r?! What kind of cat to you have that you need to recurisvely remove testes? o.0
Well, they have two of them, don't they? And you must make sure you remove both at the same time!
/* Halley */ (Halley's comment.)