Here's the list of the parts of the series:
- Part 1 - introduction, sample usage
- Part 2 - problems in making an event-based ajax callback model (and his solutions)
- Part 3 - the use of JSON in the framework
- Part 4 - implementation of the Scriptifiable interface
- Part 5 - implementing the Remotable interface
You can download the latest version of his Ajax framework directly from his blog.