To answer folks questions, if you are flying PMUA intra-Asia (including GUM-NRT) are NOT eligible for UDU until the computer reservation system is officially merged later in Quarter 1 2012. If you are flying PMCO intra-Asia you ARE eligible for EUA (eg. GUM-HNL; NRT-SIN etc...)
Hope that helps to clarify. The next few months will, arguably, be the most frustrating as many of us wait for the 2012 benefits to kick start.