Kudos to Judge Alsup for his order regarding copyrightability of software API's - for both for legal as well as technical explanations - in Oracle v Google. This aspect of the case is reminiscent of Java Wars Round 1 (Sun and Microsoft).
See, Order Re Copyrightability of Certain Replicated Elements of the Java Application Programming Interface, http://www.wired.com/wiredenterprise/wp-content/uploads//2012/05/Judge-A...