The theming ability of rockbox is pretty limited from what I've seen. I've seen some patches that extend the current capabilities (such as having multiple fonts, being able to theme the menus, etc), but I am staying away from them so themes I make work with current builds that are readily available. I guess, in short, theming is limited to WPS, with the added effect of specifying a background and font for everything else.
I'd like to see theming expanded, personally. I want to be able to use multiple fonts (or perhaps move to a font system that allows variable sized fonts), match the menus to the WPS a bit more, and possibly even have some ability to manipulate the menus a bit. I know some devs will probably say all of this can already be done, but I'd like to be able to offer a package that is dumped onto the device and is usable from there, without recompiling, or overwriting existing system files.
Of course, this is an auxilliary request from me. I'm wanting stability and performance to come first
