NBC's The West Wing continues to march down the list of actors we've seen somewhere before with special guests in each episode. It's a cheap pleasantry, but I enjoy it. So I was pleased to see Christopher Lloyd make a cameo in the recent episode, "Wake Up Call."

A similar but more surprising pleasantry was to notice that Lloyd was playing Stanford law professor Lawrence Lessig, an actual person you may have heard of who is famous for his work on technology and copyright issues. Lessig has a blog and blogged about his character's appearance on the show.

Lessig will be doing a volunteer-powered revision of his book, Code and Other Laws of Cyberspace. The revision will be stored and tracked in a publicly-readable wiki, available for all under a Creative Commons license, and published in paper form this autumn.