Fisheye is a media hacking tool which allows criticism of web pages. Links to criticism are embedded like footnotes and visible to other Fisheye users who visit the page.
One goal is to take all the great media criticism scattered across the web and index it in a single place - the story being criticized. Links are tied to specific text and color-coded by type. At a glance, you can see what types of problems people have identified with the story.
Fisheye is currently in "developer beta" status. It is available as a firefox plugin and a firefox-compatible proxy. Support for other browsers is expected.
Fisheye is built on ShiftSpace and supported by turbulence.org.