Souljanyn3, Chip,
No one can know for sure if when the last "full bloods" lived on the island, But for that matter, no one can know when the last Full blood Spanish or Africans liverd either. Remember the Spanish who came to the islands were a mixture of different ethnicities from all over Spain. In addition to this the Spanish were mixted with gypsies, Jews, moors, etc.
When you study the archeology of the Caribbean from the first "Peopling" to the present, you will find that the Taino were already a mixed blood people. So the term full blood (whatever that really means) does not apply. The DNA tests mainly reveal that when one uses this tool to track human migrations, it becomes evident that the Taino, never disappeared, but did in fact evolve. All cultures that do not evolve, truly perish. It can be surmised that this applies to people as well. The fact that we have so many cultural, linguistic, and now genetic components of our Taino ancestors in the modern Dominican/Caribbean is a testament to their greatness and to Indigenous resistance.
B