Dr. Stuckwisch has a terrific post on cremation, burial, resurrection, and the church's commemorations. Here's an excerpt:
Too many Christians have regrettably swallowed and perpetuated the lie that the body is nothing but an empty, useless shell following death. We would not dare to speak this way about the body of Christ the Crucified, and God forbid that we should speak in such a way concerning His dear Christians. It is precisely in the face of death that we ought to confess most boldly our faith in the resurrection of the body and the life everlasting.
Read the whole piece here.