A new service from Twitter looks set to rattle Facebook by allowing users to send and receive tweets while browsing other wbsites, in the same way as Facebook Connect.
Twitter has unveiled a tool that allows users to tag each of their posts with their current location. Now people can know the exact areas where each hourly musing is posted.
It hardly bears thinking about - there are now 50 million tweets a day, according to Twitter. That's 600 per second.