http://www.gulf-news.com/Articles/news.asp?ArticleID=80927
which talked about some new viruses which are circulating around with subject lines like "WTC Survivor".
When I checked my anti-virus program, it was telling me that I needed to d/l the latest files (I use a free service, and you have to manually get the updates). If you don't have a self-updating anti-virus program running, I'd suggest you check for the latest set of files!