The slides that I presented (with one error correction by Stefan) and the examples are now up online:

• Extending Ant (OpenOffice 2 format)
• Extending Ant (PDF format)

The sourcecode is up online, under the extending/apachecon bit of the antbook CVS repository.

In particular, here's the scriptdef examples.

For the Java tasks and types, here's:

1. The build file, including tests.
2. The ResourceSize task
3. A RandomResource; this produces a stream of randomness on demand
4. The random stream.

The antunit test cases for the resource are failing, but that is because the random stream is invariably the letter 'a'. It is not ready for production :)