I have started a Paralax (I think I got the spelling wrong :) Scrolling Component over on CodePlex [http://www.codeplex.com/]. It is an open source type of project that is designed to help game writers create repeating scrolling backgrounds.
It is far from complete but has some basic functionality, such as a 2d Camera, Layer Oscilators and also Scrolling and Clipping.
If you are interested in either the code or helping me code it visi the XNAParalax Component http://www.codeplex.com/Wiki/View.aspx?ProjectName...
Or leave a comment, I would really love feedback.
About Me: Paul Kinlan
I lead the Chrome Developer Relations team at Google.
We want people to have the best experience possible on the web without having to install a native app or produce content in a walled garden.
Our team tries to make it easier for developers to build on the web by supporting every Chrome release, creating great content to support developers on web.dev, contributing to MDN, helping to improve browser compatibility, and some of the best developer tools like Lighthouse, Workbox, Squoosh to name just a few.