brightness is actually quite good.. right now I have it set to half power and it is clearly visible in daylight. also there is a brightness setting for both battery power and for mains power. keyboard color is blue and seems to be non adjustable but it is not very bright which suits me well as I tend to get tired eyes if it is too bright. however one thing that puzzles me is that there are no lights in the softkeys.. quite odd... but of course you can feel them in the darkness :-)
the volume can be turned up quite high.... almost to the point were it is distorted... which is a bit to much actually. the sound for the ringtones thoug is quite low but then again then the standard ringtones really sucks... I will definitely replace them with my own... maybe they will seem louder.
hope that helps ;-)