Correct me if I'm wrong but you load a 3D file that contains the model, it's skeleton, and animation, and the animation portion tells you where the position of the joints in the skeleton are over a given period of time. Does anyone know of any programming tutorials that walk you through how to load and process these types of files. File format doesn't really matter, just something that I can easily find models for.

Real Soon Now, great tutorial on the file format for Milkshape.