i know eset are releasing more old signatures at the moment, and today has seen some more added http://www.nod32.ch/en/news/update.php#CurVersion but some of these are like 5 years old(!), eg ethan.bb http://www.sophos.com/virusinfo/analyses/wm97ethanbb.html (added by sophos in 2000). why are they being added now? i know there was a HUGE update just before the deadline for the av-comparative test, and hopefully that will help gain some ground on kav, etc. but where are these samples coming from that are so old? and why the decision now to include them?