I read this article from Singapore Airline's website :
"In addition, Singapore Airlines’ KrisFlyer members and frequent flyer members of the partner carriers will be able to redeem their frequent flier miles towards e-ticketed interline travel on the participating Star Alliance partners, SilkAir, Virgin Atlantic Airways, Delta Airlines, Continental Airlines, Cathay Pacific and Japan Airlines"
Does anyone know if its true? Is that why CX pulled out of SIN CGK? Because no oneworld member is flying the route at the moment.