Is there a place for LEDs? I find them useful on my Kinesis Advantage, which has two layers (unfortunately with a small, rubber layer switch, out of reach), and one of them embeds the ubiquitous numpad layer. When I cannot type, the first troubleshooting step is ckecking the LEDs. E.g. I am on the second layer with no numlock (so that is why J behaves like a left arrow key.) Therefore I suggest more than the usual 3 LEDs. The additional layer indicator LEDs can be controlled by the firmware. Software indicators may be useful for many people, but they have little benefit if a keyboard is used with several computers. I am already using my Kinesis with KVM and three different hardware: one Windows, one Ubuntu desktop, one Ubuntu with text only terminal.