The Untiversity of California, Santa Cruz’ Wiki Lab show their Wikipedia trust coloring demo. The text in a Wikipedia page is colored according to its contributor’s reputation (See what each color means). The reputation of Wikipedia authors is computed according to how long an author’s contribution lasts in the Wikipedia. “Specifically, authors whose contributions are preserved, or built-upon, gain reputation; authors whose contributions are undone lose reputation.” Details of the algorithm are presented in their paper A Content-Driven Repuration System for the Wikipedia. [The UCSC Wiki Lab was first mentioned in this article from The Jerusalem Post.]