I finally might have a bit more time to start converting the classes and creating test cases for the scripting engine. Was curious to see what you felt were the most important classes and units to convert. I'm thinking:

phxImage
phxSprites
phxSpriteEngine
phxTexture
phxFont

I'm sure that there are more, so let me know. I'll post something once I have some demo's working with the headers. I figure that will be the easiest way to find what I'm missing