Do feats such as Angel Wings (aasimar) or Tail Terror (kobold) function whilst wild shaped? There are other feats as well that either grant natural attacks or other benefits based on form that are also in question.
The only decider I can think of is if it creates the alteration with the feat (as Angel Wings creates a set of wings) it will work irrespecive of what form is taken. Feats that grant additional abilities with body parts should require that body part present to function (I'm unsure if Tail Terror falls in this category).
Edit: Does this mean an Aasimar Druid can wildshape into a tiger and swoop in on Angel Wings and pounce on his enemies if he has the necessary feats?