This might not measure up to Amazon's rumored success, but if B&N manages to sell a million Nook Tablets this year then they will be one of the top manufacturers. It will also be a great first month of sales. To put these sales in perspective, the RIM Playbook only sold 250 thousand in its first month and the Motorola Xoom, Google's flagship Android tablet, only sold a 100k.
But we also shouldn't read too much into this. Just because B&N orders a lot of Nook Tablets and gets them in the warehouse doesn't mean that they're actually selling them. Nor does it it mean that customers aren't returning them, like I did with mine. In fact, I would bet that B&N will see a fair number of returns. Look at the steady supply of Nook Color refurbs. Barnes & Noble gets so many of those back from customers that they can supply Overstock, Walmart, and still have enough for the occasional sale on Ebay. No matter how many NC they might be selling, that's still a large volume of returns.