I've been in the [[http://www.ciemmona.org/2009/|Ciemmona 2009]] in Rome - it holds the [[http://www.inventati.org/criticalmass/planet/|Critical Mass]] Interplanetary.
It was a very beautiful event, stimulating and creating this consciousness to use the bicycle.
We were in 2 or 3 thousand people, riding through Rome's roads, for hours, all the day long, until the night.
People participating from many countries other than Italy, like France, Spain, Brazil, Indonesia.
And of all ages, from babies on the chests to old people. Also, lots of artists, playing and juggling during the ride.