Hm... In my case, sound is normal, but not so loud as in original firmware (about 50%) and with "hr-hr-hr" instead of Basses. And if I try to play *.ogg file, it plays, but then screen is off (by timeout), player hangs up and does not response on keypress or touch, only reset helps.
Maybe we can patch file browser to associate, for example, *.pdf with reader? (again, it's not my idea, it's already implemented for siemens). Single elf (daemon) will handle such associations.
I think we don't need special library for pictures (pnglib) and patch for writing strings that elfloader on Siemens has, but at my opinion would be nice if we will have icons in toolbar. By default, in toolbar only clock and battery, and most place is empty