Well the fact of the matter is that if you go by the numbers (percentage-wise), Africa... as does Asia and CONCACAF... gets relatively screwed on the number of World Cup qualifiers. (So ol' Denny does have a point).
The percentages favor Europe and South America.

I still think Europe and SA fight it out over the "Continental World Cup"... while Asia brings up the rear.

Seriously though... makes you wonder why the uneven percentages between continents. It's not like the sport isn't popular globally.