I'm using TrinityBars 2.0 with two button bars. The first is 8x4 and maps 1-6,q-y,a-h,z-n with four left over to map to extra mouse buttons (which in-turn map to NUMPAD keys). The second bar is 3x6 and are mapped to my G15 keys. Since I'm on a mac, I don't use the Logitech driver and use ControllerMate instead. This allows the top four buttons (M1-M3,MR) to be used to switch button pages. This gives me a total of.... *counts on fingers and toes*... 20 bajillion keys.