I am having too much fun with a new list wiki that Amazon has created, and wondering how libraries could use it. They have named it UnSpun (beta).
The interface is smooth and pretty intuitive -- lots of Ajax so things fade nicely in and out as you write or save.
Most Powerful Character in the TV Show "Heroes," Favorite Quote from Your Mom, and the Best Things about Public Libraries.
Scratch your librarian/geek/listmaking itch and check it out. I am happy to say I created the first 3 lists for Tucson, AZ and one entitled "Best Book to Read a 3-Year-Old Child before Bedtime."