We just presented this in the /etc room at BarCampNYC. The general idea is to "turn the web into a wiki" by caching a feed of scripts from trusted friends that change the web for the better. For example, Richard M. Stallman might produce a script that replaces "Linux" with "GNU/Linux" whenever he views a page with that term.

• The extension as we plan to demonstrate it
• A pdf our presentation
• SVG of page one
• SVG of page two

The people who are doing this are those two idiots sitting on the couch in the lobby: Mike Goelzer and Brandon Stafford. We can be contacted at first.last@gmail.com, if you perform some clever substitutions.

For more information, your best bet right now is Brandon's blog entry from Friday night. There's also an earlier post that discusses the same idea.