I am excited about Pixel Bender and id really like to learn more about it but i dont know where to look.
I tried googling for "image processing formula" but that didnt really help much. I have also seen people recommend openGL or GSML or something like that but then i dont know how much use this is to me. Pixel Bender must be entirely primitive compared to the likes of a standard shading language? Then you have the various limitations in Flash.
Im not sure what i want to be looking for. I can google for pixel bender files but short of copy and paste, i have no idea what is going on.
This is a perfectly timed question! Since my intro to Pixel Bender tutorial from MAX 2008 was posted yesterday on the Pixel Bender developer center: http://www.adobe.com/devnet/pixelbender/
Look at the section called "Learning Pixel Bender", in addition to my tutorial, there are videos there from Lee Brimelow and Paul Burnett that walk you through creating Pixel Bender filters and using them in Flash.
There are indeed GLSL and HLSL (Direct X shader) language resources that would also help you with Pixel Bender, but you might be best off starting with the resources above and then just have fun screwing around with the math in your kernels and experimenting. That will get you a basic understanding and then you can go from there based on what interests you. You should also look at the Pixel Bender filters in the Pixel Bender Exchange: http://www.adobe.com/cfusion/exchange/index.cfm?event=productHome&exc=26&loc=en_us for reference once you understand Pixel Bender a little better.
Hope that helps!