SARS will be big event in third world where infection control and public health awareness is nearly non-existant. It may only be a sub 1% GDP event but deaths will be very large in places where AIDS, malaria and other diseases that William and Melinda Gates Foundation are focusing on.
In Hong Kong, they just recently found out that most lung damage after 1st week of infection is caused not by the virus but by the bodies immune defenses. It seems like some of the immune suppression steroids may be of useful treatment with further study.