links for 2009-06-25

Most people could only dream of seeing the modern seven wonders of the world in their lifetime. But one Manchester businesswoman has set herself the challenge to race around the globe to visit them all in seven days.

Where is everybody? Anecdotally and experimentally, they've all gone to Facebook, and especially Twitter. At least with Twitter, one can search for comments via backtweets.com – though it's still quite rare for people to make a comment on a piece in a tweet; more usually it's a "retweet", echoing the headline.