This tutorial really helped me understand the finer points which allowed me to more easily make all of my tables more accessible and my site has lots of different (but legitimate) data tables.
Once I finish looking for and updating any overlooked tables I'll be ready to have a blind user take my site for a spin so that I can find where I have any issues. Now if I just knew someone who was blind to do this for me. I doubt any increased ad revenues from making my site more accessible (it was pretty good to begin with) will justify the time commitment, but it will be nice knowing that as many people as possible will be able to access and benefit from my site. It would be nice to know that my site was in the top 99.99 percentile for accessibility.