"Caps Lock Indicator"
I'm not going to be able to comment on the specific request for a status bar indicator other than to say that Hackers and other keyboards have no real connection with external keyboards, but I will offer a couple of observations and alternative solutions.
The fact that Hackers (and other) keyboards have no information about the caps lock status of a bluetooth or external keyboard can be seen by turning on the "virtual keyboard" when the external keyboards are attached and toggling the caps lock on the external keyboard.
Android onscreen keyboards indicate the caps lock status by changing the "case" of the onscreen keycaps... i.e. toggle the caps lock and the osc keycaps will remain in uppercase and, again, this does not happen when an external keyboard capslock is toggled.
If a visible capslock status is important, you might consider using a USB rather than bluetooth keyboard. The capslock and numlock leds on USB keyboards work when they are attached to android devices. This is another indication that Logitech needs to be the source for a capslock indicator, either on keyboard or onscreen.
There is a "kludge" that might help... if you set your android device to display a virtual osk when an external keyboard is in use, the _virtual keyboard's_ caps lock key will both toggle caps lock on the external keyboard _and_ give you a visual indication that caps lock is on by the case of the keycap characters... unfortunately, the reverse is not true.
Hope this info is useful,
Beverly Howard