See, for example, “#Amazonfail, the Google Books Settlement, and the importance of open access for preserving cultural heritage: In honor of National Library Week” posted on April 16:

Over the past two years for National Library Week, I have posted about the importance of openness of publication and accessibility of government information and the limitations of relying on Google. Free Government Information, Public.Resource.org, OpentheGovernment (PDF),  and others, are continuing to do a great job of promoting openness in regards to government (and scholarly) information. Unfortunately, most people are not aware of the great usefulness and importance of government information. But they do know about Amazon, Google, and YouTube, with many among us using them everyday. What would many do to find information if they stopped working?

The #Amazonfail censorship/ glitch / griefing situation last weekend shows the power of publics working together and the organic nature of much of tagging and movementsourcing; people will often be able to create a simple way of communicating information with each other (the first person to use the #Amazonfail tag on twitter used it because it worked as a folksonomy of the situation and it spiralled from there because it was effective). But it also shows the difficulty for all when most rely on one source — Amazon — for information about bestsellers and similar items.

Great work, Learned Fangirls!