There is no case law discussing any of these points in the context of an assertion of reporter's privilege; see generally Fed. R. App. P. 8. Generally, a non-party witness may not appeal an order denying a motion to quash or compelling production of records; an entry of an order holding the witness in contempt of court is deemed a "final" (appealable) order. Of course, counsel should seek to obtain a stay of any contempt sanctions pending the appeal (which is not a foregone conclusion).