An article by Peter Sloane and Jonathan Thomas about the work for hire doctrine under U.S. copyright law has just been published in the Federal Bar Council Quarterly.  See

http://goo.gl/Ycc5j0.  The piece discusses the decision of the U.S. Court of Appeals for the Second Circuit in Marvel Characters, Inc. v. Lisa Kirby, a case closely watched in the comic book industry and more generally among artists and publishers.