Here is a summary from the GDC 2010 site:

Come learn how to take full advantage of the advanced hardware capabilities of Palm's webOS devices--including full OpenGL ES 1.1 and 2.0 support--using the recently announced Plug-in Development Kit (PDK). This technical session will provide an architectural overview of Palm's hardware and software platforms and then provide hands-on details for how the PDK exposes these capabilities.