In the new jQuery mobile there is a new panel option. I have implemented this and it works, but I would like to customize the width of the panel. The standard width is 272px
I figured it out! It's not that complex, really. I myself am just using structure.css but if you're using other CSS files there MAY be more to customize. Anyway...
Using your favorite editor, do a find & replace for "17em" and replace that with the value you actually want. There's styling for left panels and styling for right panels. I wouldn't rush through this whole process as there could be an unrelated "17em" here or there. It just takes a minute...
It's a simple answer but I'm happy with myself :p