I heard about VERSIONISTA on Rachel Maddow today. Very interesting site....

[BrklynLiberal]

http://versionista.com/

Versionista monitors Web sites that you specify for edits. Our Web-based service records every change, clearly highlighting added or deleted words and sentences.

You can view multiple generations of edit histories for every page on a site. At the same time, filtering eliminates information overload by tracking only content that matters.

Comprehensive competitive intelligence

Versionista was designed by PhDs for the rough-and-tumble world of today's Web.

* Every site edit, version, and deletion is "set in stone" by Versionista on an hour-by-hour basis.

* Precise historical mapping of a Web site's edits, including "scrubbing" of potentially compromising information, is a competitive advantage to journalists, campaigns, corporations, legal professionals, and activists.

* Integrate Versionista with your own site to provide viewers complete edit transparency to your pages, automatically displaying last revision time and letting users interactively explore exactly what has changed.

* Versionista gives a "big picture" visualization of the evolution of a site, particularly one that has multiple editors, bloggers, or outside contributors.

How it works

A side-by-side comparison and multiple other views let you see "before and after" versions of every monitored page. We highlight what text has been added, deleted, or moved. Versionista will keep up to 25+ versions per page. You can "rollback" in time to see older versions.