A new post on the Zend Developer Zone points out a talk that's going to be given at the National Arts Club about making mobile platforms with the help of PHP5.

Kargo derives significant competitive advantage as their application designers & producers make use of Zend Framework to build their next generation mobile application platform on. [...] Zend Technologies will present an introduction to the modular "use at will" PHP 5 components in Zend Framework and Kargo will outline the high-performance messaging server and mobile internet platform they've built.

You can find out more about the meetup from its page on Upcoming and check out this page for more details and a map to the location (New York, NY).