Not just CX...SQ's down too...
http://www.singaporeair.com/jsp/cms/...navailable.jsp
Commercial bookings temporarily unavailable
Due to an issue with our third-party provider, we apologise that the SQ Mobile application, Singapore Airlines and SilkAir websites are currently experiencing technical difficulties related to commercial bookings. Our website team is working to resolve the issue.
We apologise for any inconvenience caused.
Last updated 7 August 2013, 1530hrs (GMT +8)