I figured out how to address a few requests for greater customization options and also how to add a preloader image if a pages are sometimes slow to load. The theme option was also partly inspired by my recent work on a Facebook extension to WP e-Commerce, which was a sort of spin-off of Facebook Tab Manager code.
I’m just starting the process of moving most documentation over to facebooktabmanager.com, so see the links below for more details.