@bartveld: Yeah, no 'burn' with an e-Ink screen. It's just a visual cue to show that the Kindle is sleeping

.
@drendo70: DropFuse is in Python. So, unless someone ports it to C, not gonna happen

.
As for a full featured busybox, the Kindle already has one (albeit a bit outdated), and I don't really 'miss' any tools. Those that I did miss and built & bundled weren't even part of busybox

. But nothing prevents you from x-compiling one yourself

. And symlinking it into PATH or tweaking the shell rc file (if the busybox shell bundled even support such a thing). (Or even drop me a busybox config and I'll build it for you).
@oodseo: Er, the telnet daemon shouldn't even ask you for an username. Try SSH.
And don't use the usbQa command. It hasn't been needed for as long as I can remember. And you *won't* be able to use your Kindle connection on your computer, it's the other way around. And don't even ask about it, it's against Amazon's TOS.