Sony PRS T3 Has a September 19th Release Date.
It doesn't clear up if the light uses a flat button-type battery though or runs off the reader battery. And I'll never understand those who insist every device must have capacitive touch, that IR touch is somehow inferior. IR touch for me works perfectly. Other than an occasional bug triggering a page turn when I read outdoors in the hot summer months, it's perfect in all weather for me.
Edit: And that's the same link as speakingtohe already posted, I didn't check out his link first, sorry!