Last night I presented my "Real World AJAX" talk to PDXRIA (our local Portland Adobe User Group). I said I would post the code. So, here it is! (Download link below)
I have included the PDF slide presentation too. There are not a lot of slides. This is a code heavy talk. It uses a very simple CRUD application to demonstrate adding AJAX to an existing application. There are three versions in the zip. One completely paged based. Another one with some 'partial page update' style AJAX to improve the user experience. And a final one with some DHTML and DOM building. The code uses an in memory query object instead of a database. So, you should be able to drop it in a folder and run it with no setup.
Also, I built the slides in OpenOffice.org Impress. If you would like to give this talk to your user group, or somewhere else, let me know.