Another blog comment about a library futurist speaker, Joan Frye Williams, at the Mid-Atlantic Library Futures Conference, this time from "2 Cents Worth": http://davidwarlick.com/2cents/2006/11/04/saturday-morning-keynote-by-joan-frye-williams/
One of the great suggestions: make an entry for your library in Wikipedia. Users often don't start at the library itself, so put out sign posts where they are looking.