If I were involved in the marketing of Ubuntu... here is the advertising campaign I would run.
Setting - a school IT classroom
Music - Pink Floyd. "we don't need no education"
Theme - zombie kids being taught to use a popular word-processing application by (no names).
cool kid in the back of the classroom has a different desktop... what is it?
he's spinning the cube switching between all the killer apps. he winks to camera.
"because kids don't need no thought control"