Gotta remember this great article from Smashing Magazine when doing the WPA Council website redesign this spring: How To Use Help Elements To Improve Your Designs.

The older I get, the more my eyes complain that they are past 40 now. I'm having more trouble reading on the screen these days than I did ten or even five years ago, and somehow I suspect it is not going to get better (lol).

Thus, I've become more sensitive to readability issues in regards to font size. There are two instances in particular where designers really should pay more attention to accessibilty:

In part 2 of their "Using open source software to design, develop, and deploy a collaborative Web site," IBM developerWorks has posted a great tutorial on analysis and design of putting together a website. I will probably use this in my writing for the web class in the fall.

In Search engine optimization: beyond search keywords, Gerry McGovern makes a key point here that expresses the rhetorical situation of SEO: we should be optimizing for people who search.

Sometimes, those involved in search engine optimization lose sight of certain absolutely critical issues. The objective should not be to optimize for any particular search engine. It is to optimize for people who search. This is a subtle but essential distinction. It's easy to get obsessed with the technical aspects of Google and Yahoo!

Chapters 9, 10, & 11 from Steve Krug's 1st edition of Don't Make Me Think is available online. In these chapters, Krug talks specifically about usability testing.