Make sure your IT People are aware of it and are dealing with it. As an interim measure, and for home users, consider blocking your firewalls to stop the virus from 'phoning home'. It's not a real defense, but it might stop a few issues. Having said that, the FTP site the virus was using seems down - but that could be for any number of reasons.
I guess the real question is, if a common component like a jpg decoder has a buffer overflow - just how good was the MS security push? If it left serious bugs like this, what other horrors are waiting?