I think teachers and learners should definitely use Twitter.
When Tony suggested that we first use it for the HHL 2007 conference many people thought we were barmy and we only had around 40 people out of 800 using - which given that the conference was about mobile computing was a somewhat dismal uptake. However at the last HHL and GBL events the majority of delegates were either using it our reviewing the conference feeds - not to mention those who couldn't be there.
Now of course, Twitter like many social media is simply part of the digital landscape that should be embraced.
What is disappointing is how how many schools and authorities are banning access to Twitter via their networks in a typical campaign of myopia, fear and 20th century thinking.
This is one of the topics being debated at our
Digital Safety Conference on June 19th