I'm pleased to present you with part one of a two part series on creating a photo site using PHP, jQuery, and AJAX. Originally, I intended to fit the entire tutorial into one screencast, but that quickly became a pipe dream as I realized that there was simply too much to cover. Nevertheless, even if you only watch this first video, you should learn a great deal.
In this first part of the series he'll walk you through creating a simple login form to authenticate the user, grab images from the database and show how to keep the database updated. There's a screencast along with the code/html for the tutorial as well as a source download if you just want to skip straight to the good stuff.