Social services are very much in the news at the moment. Google has recently introduced their Facebook competitor Google+, and the project has been received with great interest, but Facebook still has the upper hand with more than 750 million users worldwide.

The micro blog service Twitter has now published some new statistics, and according to these, it is now being sent 200 million Twitter messages (Tweets) each day, compared with 2 million two years ago, and 65 million a year ago.

According to Twitter, these are the top Trending Topics for the first half of 2011, divided into the two most popular categories:

World events/News

  1. AH1N1 – Swine Flu
  2. Mubarak – former Egyptian President
  3. Easter – Christian holiday
  4. Cairo – capital of Egypt
  5. #prayforjapan – sentiment following the March earthquake and tsunami
  6. Chernobyl – site of nuclear disaster in 1986
  7. Libia/Libya – site of an ongoing civil war
  8. Fukushima – Japanese nuclear power plant
  9. William & Kate – Newly-named Duke and Duchess of Cambridge
  10. Gadafi – Libyan political leader

Pop culture

  1. Rebecca Black – pop singer
  2. Femme Fatale – newly-released Britney Spears album
  3. Charlie Sheen – actor
  4. #tigerblood – hashtag popularized by Charlie Sheen
  5. Nate Dogg – rapper
  6. Anderson Silva – Brazilian mixed martial artist
  7. Tom & Jerry – famous cartoon
  8. Mumford & Sons – British rock band
  9. Bieber alert – referring to artist Justin Bieber
  10. Queen Gaga – referring to artist Lady Gaga

(via Hardware.no, Twitter Blog)