I couldn't agree more with these posts. There is a whole world of Latin rhythms out there (pun intended). Having worked in Latin bands for the last 20 years, I can tell you there are enough various styles/regions to fill at least 3 MIDI packs of beats - many already mentioned here. Afro-Cuban and Brazilian styles alone have a vast array of styles and tempo based rhythms. And having really well executed drum kit-based rhythms in these styles would be so darn useful.
And I need to emphasize drum kit-based. While most of the Latin American rhythms were traditionally played with each musician on a particular percussive instrument, drum kit-based versions of practically every single Latin rhythm have been well established and utilized. A Latin rhythm MIDI pack or even a series of packs is sorely missing and needed!