I've be interested in Web Accessibility for a while, and collected a pile of links about it in 2002 for a project.  I even turned off my monitor for a day and ran "Jaws," a screen reader for Windows that blind people use. (Seriously, try this one day - if you ever go blind, at least you'll know how you'll keep your programming job.  It was comforting to know that I could keep my job.)

Scott Mitchell has a great article on accessibilty up on MSDN.  Kudos to Scott for this; there just aren't enough people who realize the need for accessibilty and few people take the time in their projects to make a site truly accessible.  You don't know how many customers you are losing if they can't even get to your site.

It's great to know that ASP.NET 2.0 will generate Section 508 compliant markup by default.  Nice to know there is some commitment.

If you need Section 508 compatibility now, you can patch the ASP.NET 1.1 DataGrid TODAY with the June 2003 Hotfix (Q821156).

Also, be sure to check out Mark's Dive Into Accessibility book, it's an invaluable download.