Pixel Bender just got it’s Technology Center at Adobe Site, with tutorials, presentations and various resources here’s an excerpt of the site:
Adobe Pixel Bender technology delivers a common image and video processing infrastructure which provides automatic runtime optimization on heterogeneous hardware. You can use the Pixel Bender kernel language to implement image processing algorithms (filters or effects) in a hardware-independent manner. The Pixel Bender graph language is an XML-based language for combining individual pixel-processing operations (kernels) into more complex Pixel Bender filters.
The Pixel Bender Toolkit includes the Pixel Bender kernel language and graph language, the Pixel Bender Toolkit IDE (an integrated development environment for Pixel Bender), sample filters, and documentation.
For more info check: Adobe Pixel Bender Technology Center