Dries Buytaert, founder of Drupal, has summarised a fascinating set of events surrounding how Microsoft posted anti Drupal advertising via Google Adwords yesterday. Several of the Drupal community noticed and began Tweeting about it. Before long a firestorm of chat was occurring and Microsoft noticed and reacted in an admirable way considering on the one hand they were trying to compete with Drupal and on the other they positively promote Drupal.