Philippe Adjiman has created this high-quality video tutorial that demonstrates how to make calls to OpenCalais from Java code. In only four minutes you can see how to make those calls.
This overview and guide to using Calais offers straightforward directions for installing, configuring, and using Calais. Author Angie Byron also offers Drupal pointers and links.
I have written a small tutorial showing how to use features from the 3.1 release of the Calais service to geotag a text and display the identified locations on a map. The tutorial can be found on my web site and a running version of the demo application is here.
