Unless I'm missing something on the nav bars, I think we may be talking about two different things. Here's an updated image to show more specifically what I'm talking about:
http://i.imgur.com/0jDZ0.jpg
I'm talking about the vertical a-z index on the right side of the window. Tapping the letter "R" would jump down to the "R" heading. I'm not sure if there's a more proper title for it. This is sort of a staple in iOS native development, but is this concept possible with jQuery Mobile?
Thanks for the advice on the filter. That may be my only option here.