I'm probably jumping to the obvious conclusion, but I do have to wonder if Barnes & Noble will be holding an event 11 days from now. But we know they have a new NookColor and it has to come out eventually. Also, that week is just about the last chance that B&N has to release the new NookColor; the Kindle Fire ships soon after. (I'm not sure the new NookColor will have much of a market if it's not available until after the Kindle Fire ships.)
On the other hand, my info comes from a retailer that they're going to need to ready space for a new Nook display. While that's interesting, it doesn't necessarily mean that a new Nook is coming.
Update: Check out what my second source said:
Every morning at work, we have a meeting. We discuss everything from new cafe product to books and music/dvd releases, as well as store goals. This morning, during our meeting, we were talking about this brand new NOOK department. Nook has never been considered a department, ever. Our store has went through an entire makeover the past couple weeks. We discontinued music/dvd/and audiobooks. we expanded Toys/Games to the back as a new department. in the center we took away the customer service counter and built a massive NOOK boutique. This space is HUGE, with bright lights, LED TVS, touch screen POS systems, the works. Our manager told us, this space was not designed to house just 2 nooks. He was being candid, he said, November 7th there will be a major announcement from the company. he concluded saying it was exciting times. Obviously something is coming.
Update 2: I now have a third B&N employee reporting the same thing. Yeah, I'd say it's going to happen. Would anyone care to guess what we'll see? I'm thinking that the original Nook might be retired because that would free up a lower price point for the Acclaim, thus enabling it to compete with the Kindle Fire.
On the other hand, look at how B&N responded to the K4. They dropped the price of the Nook Touch refurb so it matched that if the ad-subsidized K4. That suggests that the current Nook might be kept around with a price of $149 to $189, with the acclaim priced at not too much more.
Update 3: A Wall Street Journal article confirmed the expansion of the Nook Boutiques. That's good enough for me.