As previously revealed by i-cio.com, surprisingly few heads of IT see the value - or feel they have the latitude - to float their thoughts in the public blogosphere. However, here is our updated list of the top 20 leading CIOs who are active bloggers (most recently added ones at the top):

• Paul Coby, CIO, British Airways
  
• Nick Lansley, head of R&D, Tesco.com
• JP Rangaswami, chief scientist, BT Group
  
• Eachan Fletcher, CIO, Sporting Index
  
• Ian Cohen, CIO, Jardine Lloyd Thompson plc
• Marcus Darbyshire, CIO, South East Water
• Steve Francia, CIO, Portero Inc
  
• Vivek Kundra, CIO, US government
• John Suffolk, CIO, UK government
• Will Weider, CIO, Ministry Health Care and Affinity Health System 
• "CIO guy", a healthcare CIO's anonymous blog
• Linda Cureton, CIO, NASA/Goddard Space Flight Center
• Rob Carey, CIO, US Department of the Navy
• Peter Birley, director of IT and business operations, Browne Jacobson LLP
• Chuck Musciano, CIO, Martin Marietta Materials
• Michael Schaffner, director IT of the Valves and Measurement Group, Cameron
• Harold Esche, CIO, University of Calgary
• Pablo Molina, CIO, Georgetown University
• John Halamka, CIO, Harvard Medical School & Beth Israel Deaconess Medical Center
• David Kennedy, CIO, New South Wales Office of State Revenue

To find out why UK government CIO John Suffolk maintains a blog, see our "Should CIOs blog publicly?" debate.

To read about US government CIO Vivek Kundra's commitment to opening up the progress of federal IT projects to the public domain, read our article on the US government's IT Dashboard.

If you know another CIO who blogs, please let us know by commenting below.