Autodesk will be holding a free training session on how to use the 3ds Max SDK in San Francisco March 23-24.
The 2 day session will be aimed at the more advanced programmer and covers all sorts of the 3ds Max SDK that is not covered in the SDK documentation.
writing Hardware materials for the viewport (think DXMaterial)
How to create dynamic parameter blocks
Debugging 3ds Max plugins - how to do it effectively without losing your hair.
The most important part - this is all free! But you do have to register...
Complete details can be found at - http://area.autodesk.com/index.php/forums/viewthread/22728/