Evolt.org: Describing Document Text for Accessibility -- "A key focus of accessible web site design is providing equivalent alternatives to auditory and visual content."
Joe Gregorio points out nytimes.com's robots.txt file (the file that delineates which parts of the Web site a robot is allowed to index) isn't very friendly. Namely, it bans robots from just about every file on the server. (More info about robots.txt.) Now that he mentions it, I've never come across an NYT story via a Google search. What a hostile policy!