Elton Luís Minetto wrote to tell me that "PHPSC - a PHP user group of Santa Catarina in Brazil - is organizing an event dedicated to PHP that will take place at Chapecó on June 20." See http://www.phpsc.com.br/?page_id=10&language=pt for the schedule.
He's presenting a session on PHP and Oracle, and will show some great results of using PHP's OCI8 with Oracle 11g connection pooling (DRCP).