In the last two weeks I've been travelling around Europe to present at the Google Developer Days in Munich, Moscow and Prague (three amazing cities!).
The series of events was a great success with more than 3000 participants and lots of interest and good questions.
In the three cities I gave similar talks on the Google Apps APIs and how to integrate an application on the Google Apps Marketplace, here are the slides I used:
My talk in Prague was also filmed and is available on Youtube: