With my new job working as tech support for an ISP, I've actually seen a lot of this virus being sent to the customers lately. Here's some more info that I found at
http://vil.nai.com/vil/virusSummary.asp?virus_k=99141
Name: W32/SirCam@MM
Risk Assessment: High
Spreads Via: E-Mail
This mass-mailing virus attempts to send itself and local documents to all users found in the Windows Address Book and email addresses found in temporary Internet cached files (web browser cache).
Attached to the e-mail will be a document with a double extension (the filename varies). The document is the virus itself, with an appended file found in the My Documents folder. For example, if the virus found a file named "FIRST General Info.doc" in the My Documents file, a possible file name that it would send would be "FIRST General Info.doc.bat" Files with the second extension of .com, .exe, .lnk, and .pif are also possible(basically anything that Windows will try to run.)
Aside from e-mail overloading, it might delete files on October 16 and/or fill up hard disk space by adding text entries over and over again to a sircam recycle bin file.
That's just a quick summary, look at the URL above for the whole story...