Direct3D 10 Geometry Shader

[Xarshi]

Does anyone have links to articles on this subject? I'm working on some stuff but I have a pretty small understanding of how a geometry shader works completely. I know how to write them to some extent, and I know it falls between the Vertex Shader and Pixel shader, but I get lost on, for instance, the stream output and so on. As well as a cBuffer, but I believe that is just a way of holding variables...

 

I'm assuming this is where this would go as it does have to do with technology seeing as Direct3D 10 is a technology of some sort (software/library/sdk/whatever).