Frederic Marnad has linked to a few other articles about PHP-GTK from the PHP-GTK Community blog today:

• A guide to building out PHP-GTK with the pre-release version of PHP6
• A new introduction to PHP-GTK (with example code)
• An article on DeveloperTutorials.com on building desktop PHP applications

You can find more great PHP-GTK related content and links to tutorials and other sites on the PHP-GTK Community site's main page.