>We are now in the process of adding some real content to the homepage >of our main site thanks to all of your recent advice. But the page >will still remain graphic intensive (nothing I can do.) So I suggested >that we add some more descriptive alt's to the image tags. Someone >wrote some copy for the tags, which ended up being strings of keywords >that are unique to each image or button.
It's a good idea to use the alt tag to describe the image, rather than just listing keywords, so that if the graphics take a long time to load, or if someone has their graphics turned off, they can still see a description of what the image is supposed to be. This is also helpful for vision-impaired people using programs to read the text from the page - lists of keywords aren't going to tell them anything.