Redid my control panel a few months ago. Mainly I added an exit button (cheap radio shack button) on the upper-right. I don't like admin buttons but the EXIT buttons saved me from having to exit games for people. Also, I changed the cones from silver to black (proper color), upgraded the ball to Electric Ice Version 2.0 and applied the artwork more carefully this time. ;-)
The buttons and trackball are all RGB LED's hooked up to two LED-wizes. Two U360's, 3" Happs trackball with Electric Ice upgrade (v2.0) and a TurboTwist2 Spinner. 25" wide - Comfort and functionality!