There's a MetaFilter thread on how the MBTA has a new web site that claims to be Bobby approved when it isn't. The claim the designers' templates run through fine but the MBTA filled it with invalid content sounds reasonable to me.
But the interesting bit is about how alt text is handled, and Foaf links to Matthew Thomas's few words on the topic:
A simple guide to writing
altis this: write it so that the page would make sense as a radio script.
