I finally got the showing of a huge amount of sprites to work!!!
Woooohoo.
This means an entire screen filled with tanks? No problem.
An entire screen filled with tanks, and missiles? No problem.
An entire screen filled with tanks, missiles and other madness? Check!

So... exciting.

As for AmplituDS, I rewrote it to pure C.
That means it works on the latest devkitpro (yes, I finally upgraded).
Apparently, I can not port libmikmod to the ARM7 as I had hoped due to a couple of issues non-speed related.
Unfortunately that means I won't be able to increase the framerate of AmplituDS.

And I'm out.