A live demo can be found for different versions here:
This demo and more examples you can find in the Subversion (see Getting Started section).
The current snapshot of the demo war can be downloaded at: https://repository.apache.org/content/repositories/snapshots/org/apache/myfaces/tobago/tobago-example-demo/
Tobago contains various example applications including a general demo, an address book application, a blank WAR, and an example theme.
A live version of the demo can be found at: http://www.irian.biz/tobago-example-demo/
The Blank WAR is a minimal WAR to display a simple page with Tobago -- useful to get started with your own Tobago application.
This theme shows how to extend an existing theme and add new markups.