B&N has taken the cautious step of hiding all the images and the more interesting details, so all I know at the moment is that this device, the BNRV500-A, was tested for Wifi and has a rectangular shape. According to the tests it has 4GB of storage and a 1.5Ah battery.
I can't find any mentions in the test reports of screen size or resolution, frontlight, or card slot, but one report does include a diagram which suggests that the new device has the same general proportions as the Nook Touch and Nook Glow. The model number is the same as that of the Nook Touch, which is a sign that we are looking at an ereader.
B&N is probably going to replace the existing Nook Touch with the new model, and they are probably going to launch it in the next few days or weeks.
I am also expecting to see a new tablet from B&N. I have seen numerous leaks including listings for a BT keyboard, a new Nook for Dummies book, and new accessories, and I also have numerous inside sources that say that a tablet is coming. The latest info is that this time around B&N's tablet will have at least one camera.
There's no new info on when the gadgets are going to launch, but my sources had told me that it was supposed to have happened already.