Update:: No cyberwar attacks, just nationalist hackers.
Russia is accused of being the first country to declare cyber-war on another nation: the ongoing Estonian conflict has been accompanied by a massive DDoS attack on critical Estonian networks:
Nato has dispatched some of its top cyber-terrorism experts to Tallinn to investigate and to help the Estonians beef up their electronic defences.
"This is an operational security issue, something we're taking very seriously," said an official at Nato headquarters in Brussels. "It goes to the heart of the alliance's modus operandi."
Alarm over the unprecedented scale of cyber-warfare is to be raised tomorrow at a summit between Russian and European leaders outside Samara on the Volga.
(Thanks to everyone who suggested this!)