Also called the Downadup worm.
I have had users call this morning about a 60 Minutes segment shown yesterday about this worm going active on 4-1-2009. This actually appears to be true. The patch was first released by MS in Oct. 2008, but apparently this is another release of that worm. MS has also posted a reward to find the culprits responsible for releasing the worm. Here is info on it:
MS info: http://technet.microsoft.com/en-us/security/dd452420.aspx
MS bulletin & patch: http://www.microsoft.com/technet/security/Bulletin/MS08-067.mspx
Snopes info: http://www.snopes.com/computer/virus/conficker.asp
~ Esther
Esther V. V. Reed
IT Systems Administrator
MSU Graduate School