Who says the Library of Congress isn't archiving the open web? http://www.loc.gov/webarchiving/faq.html Specifically, it states: The types of sites archived include, but are not limited to: United States government (federal, state, district, local), foreign government, candidates for political office, political commentary, political parties, media, religious organizations, support groups, tributes and memorials, advo…
http://scripting.com/stories/2012/07/17/whyTheLocArchivingTw...
"(Note: I mean bloggers. The equivalent content that's on Twitter, but not in a corporate blogging silo.)"