I always have trouble reading the diagrams that indicate the cuts of meat. It's hard to tell how deep the cuts go, etc. Are there any 3D diagrams out there? This blog entry has a cross section of the pig and shows you the real cuts which is pretty awesome!
If you watch Alton Brown's show Good Eats (Food Network) he frequently uses 3D models to show where various cuts come from. A good example is the episode "Tender is the Loin", where he uses a model of a steer to show where the loin primal is and then location of the tenderloins.