Stuxnet

The Ancient and Noble Order of the Masters of IT works an esoteric ritual known as "backup." I do not doubt that the Iranian branch still performs this traditional rite.

Granted, the government's interest in secrecy may keep the number of backups small, but I'd guess that restoring the main systems is no more than a few days, and restoring the auxilliary systems no more than a couple of weeks. All the PCs with important information will have to have their disks combed in a clean environment, and that demands some expert time (and user time) to retrieve the vital stuff, but all is quite doable.

Work will have been lost, but it isn't a catastrophe or a showstopper. Probably pretty much everything the media has said about it is either a mistake or a lie.

What is going on?

• It could be a coincidence. Stranger things have happened.
• It could be a test weapon that got away before it was ready to be used.
• It could be a feint: for example to focus Iranian intelligence on computing at the nuclear plants rather than personnel at the airports. Anybody else notice that several high ranking Iranians died in air crashes in the last few years?
• It could be meant to panic them into buying new network gear to isolate the control systems, gear that somebody has put backdoors into.
• It could be a coverup to keep attention away from real spies in their nuclear facilities.
• It could be meant to panic them into a spy-hunt in their facilities, which could tie things up worse than a worm.
• It could be a probe to find out who's really in charge of some division.

One thing I'm pretty sure of: the announcement of a name in the code that might link to the book of Esther was meant to mislead. That's a pretty far-fetched link, and did you see the code? Me neither.