It won't be the first known case of cyberwar by a long shot. Maybe the first publicized case that the Euro media cared to review.
Certainly the first example of the Euromedia mentioning that their allies, the ex-Soviets are still commies at heart.
Still, it seems to really have disrupted Estonia more than any other attack in memory.
I bet Estonia is running windows os’s on most of their equipment...:)
Heck, I would bet that we could donate enough used stuff that would be put to good use in such a small country.