Asia residents only (its still active, btw):
http://asia.nwa.com/asia/en/oaconversion/index.jsp

Registered and faxed in my SQ PPS card first week of Feb - it said 7 working days as well. Didn't hear anything for a month, so last week so called WP SIN and they said its been sent to WP HKG and that I would hear back by the end of this week.