Have the fullscreen toggle be "sticky" - i.e., retain its setting across the viewing of multiple documents. ( Yes, I know I can turn off the title/scrollbars/Toolbar via the interface menu, but then I can't use any menus or commands without opening the slider on the TT. A sticky fullscreen mode allows me to do this by assigning fullscreen to a button.)
Have a method (in document list mode) to switch between categories via navigator pad or assigned hardware button.
Allow iSiloX to strip out entire rows and columns of a base table (useful for removing banners and navigators from a non-handheld site.)