Hey Dama & Mike, now that you mention mexican road side coconut stands and the very common open-coconut preparations and drinks, have you ever tried the "Horchata de Coco" (it would be something like a coconut/rice drink). They're very common in coastal regions of the northern states. Even though I'm from Sonora, the best horchata de coco I've ever tasted was in a road side stand in Los Mochis, Sinaloa, that thing was delicious!!
What about the preparations also common in beach stands that combine a half-cut coconut filled with seafood and salsa? Probably not for everyone but really good if you also like seafood...