Forget the impact of Twitter as a means of communicating what is happening in Iran, the recent Daily Mail poll really demonstrates the power of this microblogging marvel.
The Mail produced a bizarre online poll along the lines of 'are you still beating your wife?' It said, approximately, 'Should gypsies by allowed to jump the NHS queue?' Yes or no?
As a reaction to the terrible phrasing, a Twitter campaign spread the word to go and vote 'Yes' - not because anyone thought this was the 'right' answer but because there wasn't one. When I voted (alerted I think by Dave Gorman), Yes already had 80+% of the vote. By the time the Mail pulled the poll and pretended it never happened it had passed 90%. Wonderful.