A Useful Amplification of Records That Are Unavoidably Needed Anyway is an essay by Brett Bonfield which, dare I phrase it this way, usefully amplifies several of the major web-based entities which are intertwined with libraries. These include (but aren’t limited to) OCLC’s WorldCat, Amazon, and LibraryThing. Brett clearly understands libraries, and does a great job detailing the interrelationships between all involved.
Not directly related to the essay, LibraryThing has posted an expansion of their Common Knowledge fields for Authors and Events. This is an interesting read, as it addresses in a real-world way the need for authorities and relationships.