The IBuildings techPortal has posted the latest episode of their Dutch PHP Conference series of podcasts (as recorded at the DPC 2009 event). This new episode is Derick Rethans giving a talk on PHP and D-BUS.
The D-BUS Inter Process Communication mechanism is the basis for many system-related functionality on Linux-based systems. Both GNOME, KDE, as well as the Open Moko Linux computing platform use it extensively for everything related to talking to services and hardware. Skype, as well as other applications, provide D-BUS APIs as well.
His talk gets into the details of the PHP/D-BUS integration by creating a simple script to control a Skype instance and a PHP-GTK tool to talk to an OpenMoko application.