The Black Friday Deals Week page with the offer for the $89 Kindle is now up and the lightning deal on these will go live at noon EST (9AM PST). If you click on the link, then in the category box, use the selection list to choose Kindle Store (leave Show All at Available, then you should see the same picture that I've snipped above, but with a live countdown timer to when the deal starts. If you want one of these, be sure to have that on screen and counting down, then click just as soon as it switches from the countdown timer to a live Add to Cart button. The page will then check with Amazon to see if you were fast enough, then add it to your cart and start a 15 minute timer -- if you don't complete checkout in that 15 minutes, you lose the order.
The deal is on the 2nd Generation Kindles, which have been selling at $189 (and still are, it appears, from the Amazon page, although I don't think it sells very many of them). There are a few features (wifi, essentially) missing compared to the latest generation, but unlimited 3G and $50 less should more than make up the difference). I do not know if those outside the US can purchase these units (international sales often require a different part number/SKU), at least not for direct shipment outside the states, but suspect this deal is limited to US buyers. Also, you can't load up on these -- lightning deals are limited to one per account (although if your household has multiple acccounts, you could buy one each, of course, then register them all to one account to share books).