A problem of the "first web" is amplified with Web 2.0. Again, with the case of Wikipedia, if an article can be modified by anyone, anytime, the article will be always changing, and also blogs are always changing, making it nearly impossible to archive this type of information, because there is the question about which is the original or the final expression of a document? And also no one can know when a website will be changed, or taken down.

There are some institutions and projects proposed in order to archive information on the web, in order to give it permanence. One example is the Internet Archive Wayback Machine, which "is a [free] service that allows people to visit archived versions of Web sites. Visitors to the Wayback Machine can type in a URL, select a date range, and then begin surfing on an archived version of the Web" (Internet Archive, 2001, FAQ section, para. 1). Similarly, but limited to the UK, the British Library created the UK Web Archive, a project which began in 2004, containing "websites that publish research, that reflect the diversity of lives, interests and activities throughout the UK, and demonstrate web innovation. This includes "grey literature" sites: those that carry briefings, reports, policy statements, and other ephemeral but significant forms of information" (UK Web Archive, 2004, About section, para. 1).

However, it appears that by now the sole project to archive content from social networks was proposed by the United States' Library of Congress. On April 1st it was announced that the Library of Congress has acquired every tweet since 2006 (Oder, 2010). This project aims to archive all public tweets from Twitter.