DingDay '09 :: Weds Sept 9th
I don't think there can be enough encouragement for days where people do something completely free and completely environmentally friendly and completely nice - like ring their bike bells at each other all day.
Of course, as a true Londoner, were I unaware of DingDay I would consider it foul and annoying and intentionally smug & irritating and thus would scowl furiously at the dingers - however now I know it's meant to be a nice thing I am more ambivalent. http://www.dingday.org