I gave this talk at the Guardian in London on Tuesday 14th Dec 2010, for the Drupal Drop-In event.
In addition to the slides, I also did two live demonstrations:
1. importing Flickr photos with location data and showing them on a Google map.
2. Importing Gowalla checkins and using pubsubhubbub to show my location update in real-time on a Drupal gmap as i checked in to the Guardian HQ.
More details on my blog: