ORCID or how to build a unique identifier for scientists in 10 easy steps

Martin Fenner put up an informative blog post on Nature Network recently, summarising his ideas for the way forward on the author ID front: 

http://network.nature.com/people/mfenner/blog/2010/01/03/orcid-or-how-to...

ORCID stands for Open Researcher and Contributor ID and was announced in early December. This blog post tries to summarize some of the problems that have to be solved to develop a unique identifier for scientists.