Let me rephrase my thought on developing a killer ap.

Let's call it a killer book, written in mainstream American English (yes we will
add other languages after we have established a working model) with a good
index, glossery, table of contents, and appendix.

Let's take a look at a couple of sample target markets.

It could be an extremely knowledgeable person with research skills....

Let's assume that my default home page is google's advanced search
<*http://tinyurl.com/586ly4*>. Lets also assume I know how to construct a
Boolean Search <*http://tinyurl.com/5kyql4*>. Let's assume that my background is
as a graduate school dropout in history, with a requisite background in
researching beginning with card catalogs in the'60's. Let's assume that I have
been assembling ubuntu bookmarks, notes in Open Office, and .pdfs.

Or.....

I could be a non academician with two jobs, a young family, and a new computer
with Ubuntu installed.

Time is the issue.

If both illustrated demographics are computer users, rather that computer
tinkerers, anything that can reduce background "busy work" is a plus.

How much time does the young family man have, or the old guy have left, to
research and write his own "book" on Ubuntu each time he has to plug in his
thumb drive or printer?

The current choice for a user is to pay a bundle in dollars for a Macintosh and
expensive software, use Ubuntu and pay in lost productivity time, or stumble
along with the compromise known as windows.

In order for Ubuntu to make gains in the computer user community, it must reduce
its cost in lost productivity for new and intermediate users.