In the meantime, if you want to learn more about the Afro-Peruvian cajón, including its current use in flamenco, check out this LINK:
PLEASE NOTE: Ruben Dantas’ story on the Home page of this link about introducing the cajon to flamenco guitarist Paco de Lucia is contradicted both by Paco de Lucia in a video he recorded, and by the Afro-Peruvians who introduced the cajón to Paco. Apparently, Ruben Dantas was not a prime mover in this.