Well, it seems that B&N decided to make you authorize your Adobe ID via the device settings instead of through ADE.
But I would assume as long as you use the same Adobe ID in ADE and the NGP, your ebooks will be readable on the NGP although ADE still won't recognize the device.
Copy them manually, via the file browser.
And
B&N for your valiant efforts in reducing market share.
You're very successful, although I am not sure why you want to be successful in that...