This is a good overview of how web accessibility and search engine optimization are important and how they go hand-in-hand.
Understanding the benefits of accessibility and SEO
Improving SEO Using Accessibility Techniques | by Morten Rand-Hendriksen
View this entire Improving SEO Using Accessibility Techniques course and more in the lynda.com Online Training Library®.
Nice presentation. Accessibility is indeed an important subject, especially for visually impaired people. However, I did not realise that non-visual browsers were being used in other ways. Amazing how quickly things evolve.
But as you say many of the tags we use for that are also used for SEO and if we do things properly and using correct/semantic HTML it really is for our own good in so many ways!