I just set up Rockbox on my iAudio x5 without even starting the unit with default firmware.
Running the August 16th build (17th's link was broken/nonexistant yesterday), I wanted to be able to set my date/time but I can't select anything but "Hours" to change minutes, seconds, date or year.
Also, I can't change the background color or foreground (text) color in the LCD settings menu.