I just undertook some research, and came across this spine-tingling theory here -
There was always more to them than met the eye - theistic subliminal messages ???!!!
let me offer a new theory on the count off...
"unos" is latin for "about", "dos" refers to the 2nd book of the bible - exodus, and 3,14 is the chapter and verse. bono begins by saying this album is "about exodus 3:14" - "god said to moses, "i am who i am."
the album also ends with yahweh. everything begins and ends with "i am".
Also found this interview with Bono on U2station about what rock music is for.