Theories Mount That Stuxnet Worm Sabotaged Iranian Nuke Facilities

This entire theory seems to derive from one German guy's observation that "the worm aims to spread itself: one PLC target that has lots of nodes is a centrifuge plant; also, there was an accident in 2009, and stuxnet was around then."

One other guy observes that the worm could disrupt a PLC-controlled centrifuge. What else could it disrupt? Nobody seems to know.

That appears to be pretty much it.