Perspectives

Why journalists should use Twitter by Nico Luchsinger.

Barriers to journalists using Twitter by  Sarah Hartley.

How journalists can use Twitter by Paul Bradshaw and Julie Posetti  (who also writes here about how Austrialia journalists use Twitter)

Reasons one journalists decided  to de-Twitter by David Akin.

How do Twitter users describe the relationship between themselves and the people they're tweeting about? How do they add disclaimers? By MediaPost 

Research & case studies

1. One newspaper (Financial Post, Canada) apologises for a journalist's Twitter outburst

2.  Twitter & ...

... the Mumbai attacks (Dec 2008)

- Twitter : #mumbai

- BBC 4:  The Media Show ( 3/12/2008)

... the Iran Election (June 2009)

- Twitter:  #iranelection 

- TwitterMap

- Twitter TimeLine on Newsweek

- Poynter Online: E-Media Tidbits

- On PBS / Media Shift: How will Iranian Protests Change Twitter? 

3.  Pew Internet & American Life: Twitterpated: Mobile Americans Increasingly Take to Tweeting  Ha. ( 12/02/2009)

4. Hitwise: The UK all a Twitter. (Ha, Ha)

Online market intelligence company Hitwise reported in their February 2009 UK Media Roundup that  UK Internet traffic to Twitter.com has increased 10-fold over the 12 months to January. For the week ending 17/01/09, www.twitter.com ranked as the 291st mostvisited website in the UK, up from a ranking of 2,953 for the week ending 19/01/08. UK Internet traffic to the website increased by 974% over this period.