I am a little surprised that Amazon's new 8.9 inch Kindle Fire HD and updated 7 inch Kindle Fire HD still do not have Bluetooth. Or am I missing something in the specs? I know the original Kindle Fire did not have Bluetooth.
I know they are meant as media consumption devices. While they probably have good speakers, if you want bigger speakers or good headphones, they invariably hook up via Bluetooth.
Personally, I sometimes use a Bluetooth keyboard with my Xoom tablet to write. I don't do it often, but when I do I find the ability of value. I couldn't get that with a Fire.
I'm afraid the Nexus 7 is still the better tablet. Even if I don't get affiliate commission as I would if you buy a Fire with one of the above links.