Zoe Gillenwater has collected almost every video of screen readers using various ARIA attributes. Videos of Screen Readers Using ARIA – Updated. Really a valuable resource.
Nicole Sullivan gave the keynote at Fluent 2012. Her topic was Don’t Feed the Trolls. It’s worth a listen and not very long for a keynote.
Interesting wisdom from John Allsopp reminds us that “the web” is not necessarily a visual experience.