3D London Tube MapBarcelonaMunichNew YorkOsloParisSan FranciscoTokyoTweet-o-Meter Tweet-o-Meter adds San Francisco, Barcelona, Tokyo and Oslo to its Data Mine: Urban Tweets per Minute Due to various emails asking 'where is xxx' we have added four more cities to the Tweet-o-Meter which means more data to collect and analyse.…AndyJanuary 28, 2010