Custom Vertex Formats on the Xbox 360
In my current project, I needed to make my own vertex format so I could pass more information to the shader. Reimer has a wonderful tutorial on the subject (and the rest of his stuff is great, too). Unfortunately, the tutorial doesn’t implement a vertex format that will work on the Xbox 360.
After some searching, I found that Ziggyware has a great tutorial on custom vertex formats. The most important thing to remember is to implement the entire interface.