I can't emphasize enough how important I think it is to make library web sites accessible to people with disabilities. Patrons may be using text readers, alternative input devices etc.
I used to use voice input when I had miserably bad RSI.
Believe me, I wanted to shoot the folks who wrote web pages without giving keyboard alternatives (voice could compensate) for mouse clicks (voice could not).
This came up just now because I'm on a bit of a blogfest ... checking out other people's blogs (I can see that this could be a definite time sink).
Here's a good presentation from Jessamyn West's blog on how to make your library's web site accessible. The presentation is dated April 20, 2004.
She points out that using accessibility standards can help a variety of people:
"Users who can't see, hear, move, or process some types of information
Users who have difficulty reading or comprehending text
Users who may not be able to use a keyboard or mouse
Users who have a text-only screen, a small screen, or a slow Internet connection
Users who may not speak or understand English fluently
Users who may have older browsers, or different browsers or operating systems"
This is like putting ramps leading to library front doors... allows not only patrons who use wheelchairs in, but makes it easier for parents with strollers, staff with book carts and various others.