ALTHOUGH IT'S NOT HARD to find Irish journalists who sneer at Twitter, its effectiveness as a source of public opinion in Ireland reached a higher level this week when tweets helped push the Irish Minister for Defence from office. In his hard-hitting column this week, Adrian Weckler addresses the Moleskine-carrying old school and says "Twitter is now a must-have service".  Adrian is part of a cohort of journalists at the Sunday Business Post   who sit at the vanguard of social media connectivity between the Sunday broadsheets and the Sunday readership. I reviewed the Sunday papers with my Nokia E90, reduced four newspapers to 10 minutes, and used my new Dell M2400 to slice the video into an audio file [7 MB MP3] that should play just by pressing the button below. Serious issues affect Ireland, involving ethics in government, a lethargy about entrepreneurship, and the deepening recession.