Neil Gaiman has an interesting followup in his blog, from a copyright lawyer:
http://journal.neilgaiman.com/2008/0...-last-one.html
Having some familiarity with the Lexicon itself, I think Warner Bros. and Ms. Rowling are going to have a difficult time making their case. I know they've claimed a very high percentage of unattributed quotes, but I'm not seeing it in my own review of the material.