The apparently image mapped links on this page (and subsequent versions) were actually done with CSS. If you turn off CSS you will see a simple list of links (no images); very ADA compliant. I used this article as a guide:
Night of the Image Map by Stuart Robertson
When you click in the list 'Switch Theme' you'll notice that the page doesn't change, only the style sheet. That was acomplished by using techniques and a small javascript gleened from:
Alternative Style: Working With Alternate Style Sheets by Paul Sowden