Erica Olsen astutely and succinctly puts her finger on it. A lot of library web sites suck. If they're not flat out ugly, they're deficient in other ways like usability, accessibility, poorly customized templates or just plain old lack of updates. They ignore conventional widsom about web design standards and fail to use clear page titles, citeable URLs, coherent navigational structures and, amazingly, meta tags. They have bad, or severely lacking, search capabilities. I'm not sure why this is true, and libraries certainly aren't the only profession so afflicted but we are one that should know better. Erica's not all snark though, she also includes a list of examples of good design in a subsequent post.