There is another mass mailing worm spreading around. This one is called Mimail.c. https://securityresponse.symantec.com/avcenter/venc/data/w32.mimail.c@mm.html has details.
It sends a file called photos.zip that has the infection.
I have seen a number of these attempt to come into my system at work. We don't allow zip files in, so we are not getting infected. However, until the PCs that have the infection are cleaned we will keep getting them.