I get it too, every couple of days - just goes straight in the bin.
To repeat my previous instructions, download
http://securityresponse.symantec.com/avcenter/FixKlez.com from symantec (only takes a second).
If you have ME or XP switch off system restore, and for other windows any other Go Back type products.
Boot up in safe mode (hit F8 before windows starts)
go to where you have saved fixklez.com and double click it.
when it finishes, re-boot, and un-install and re-install your anti-virus product from scratch, and go online to update your definitions. As I read it, if you do not re-install your anti-virus the clean up may be unsuccessful. Then re-enable your system restore for ME or XP.
since klez attempts to attack anti-virus products and disable its database entries, it may be safer to do this than rely entirely on your anti-virus product, the info is sketchy here, maybe because norton wants it to be sketchy?
all the info is available at all the good anti-virus sites.
Since it came from bebops address book, everyone in bebops address book should do something, otherwise it may go around those addresses for ever...