To be fair, I think in the majority of the G15 community`s case, the LCD shows more potential that it actually gives service.
I like and use the performance monitor alot - which is a gimme with the install software, also the media display is `nice` - probably not used the media keys as much as I might.
However, in the minority of cases, as soon as I started playing RFOnline (which I dumped about a month in) I heard of G15 users using their G15s to tremendous effect. Using the LCD to show character values that u need to open menus to see and that sorta thing. Now that is a great idea. But then that isn`t available to the majority or is it included in a RFO "mod" section. In fact alot of these online gaming companies frown @ G15s coz they think us all to be macro`ing our way into advantages over other players - a very short sighted view. Some users get banned .. ?!?!!!
A G15 dev kit is available through one of the above links I believe.