"A Twitter uprising has taken place in Moldova, with anti–communists using the internet site to mobilise supporters and organise a demonstration in the country's capital. [...]
This is not the first time that a Twitter tag has been used to mobilize young people around a particular event; the most famous previous case has been that of 'griots' – the tag used to report on the youth riots in Greece, which later spread to Europe, arguably also with the help of Twitter. Likewise there were reports that last week's G20 demonstrations were being organised by Twitter and certainly Twitter played a role in reporting on them."
(Richmond, 2009)
[The people in the streets seem pretty real to me, so it is by no means just a 'virtual' revolution; nevertheless the extent to which it was orchestrated through the internet brings a whole new meaning to the idea of democratic participation.]