This offer is for those with a Kindle with Special Offers only. View the Special Offers on your Kindle (Menu, Special Offers) and you should see a new promotion (if you don't, turn on your wireless, click Menu, Sync & Check for New Items, then after the sync has completed, go to the Special Offers screen):
Get $100 off select HDTVs from major brands at Amazon.com
Click on offer, then click on the link on the offer page sign up and get an email with the promotion code. Sign-up for this offer expires on September 13. You'll get an email (right away), a link to list of eligible TVs and a promotion code to enter at checkout. Once you have the promotional code, you have until October 13 to complete your purchase. Like previous offers, this one requires you to use the full checkout process in order to enter your promotional code. Also, like all Amazon sales that use promotional codes, if you have a gift card balance, you must use it for the payment (if there is not a sufficient balance, then you can pick which credit card or other payment to use).
This offer is limited to one per device AND one per customer (and, like all recent offers, is non-transferable).
This isn't quite as good an offer as the one that early KSO users received (20% off), but is still a decent discount, if you were already looking for a new HDTV. I ended up getting a Samsung UN55D8000 with the last offer and the delivery and setup services were very good (it doesn't just show up in a UPS truck; they carry it in and turn it on to make sure it works and should assemble the base for you, if that's how you will use it and it has one).