There are rumors about a new Nook Touch soon. The rumor is that it will contain a light source--very interesting technology. This link contains a link to a video where the technology is displayed. The video is from Dec so it's possible that that technology is now inside a new Nook and ready to go.
http://blog.the-ebook-reader.com/201...night-reading/
I've mixed feelings. I don't read too much in the dark so I probably won't buy one. But I do hope this means they have updated the software to make things like the shelves work better.