Yep. From the WHO website:
The SARS situation in Hong Kong Special Administrative Region, China has developed unique features. There is a continuing and significant increase in cases with indications that SARS has spread beyond the initial focus in hospitals. These developments raise questions related to other possible routes of transmission of SARS. These may involve transport of the virus from one person to another via some type of environmental means. To date, no satisfactory explanation has been found regarding this possibility.
Environmental means is not the same as airborne. Could be infected water, feces, or even an intermediate animal host - but not airborne. If that were the case, you’d see at least ten times the people with the disease.
…and now, as of today, in relation to Amoy Gardens we know it was airborne: a construction worker with a full bladder on an adjacent building.