The title says it all. I was following this - http://forum.xda-developers.com/show....php?t=2409435
Followed everything it said.
It stated "If not, wipe all above except for your internal storage (/sdcard) and flash the zip file you downloaded earlier then afterwards, wipe your Internal Storage (/sdcard)."
I asked "Just to be completely clear, if I download the zip to my device, I wipe EVERYTHING BUT the internal storage, then I can flash it, and then wipe JUST the internal storage?"
Instead of waiting for an answer, I just did it. As you can imagine, I have a brick now. No TWRP, no recovery mode, just the static orange "Kindle Fire" logo forever. Nothing happens at all when plugging it into my pc, doesn't even recognize any device being plugged in. Called Amazon, and since it's past the one year warranty mark they won't replace it.
So, I guess I just need someone else to tell me that all is completely lost and there is nothing more I can do so I can move on and stop worrying about it and get some sleep.