Linux users and Mac users are.. (or should I say were) completely safe from this worm. it's a Win32 program.
In regards to the mention that if there weren't any malware authors there wouldn't be any AV companies and the jobs they provide, that's like saying we wouldn't need hospitals if people would stop getting hurt and getting old, and we wouldn't need police if people would follow the law. Unfortunately it's a matter of human nature that if "laws" aren't enforced then they really don't exist to be followed except as guidelines. And we all know how many people refuse to follow guidelines, or make up their own.