According to an inside source, the Nook 3G is being discontinued by Barnes & Noble. The company cites lack of bulk demand for the device, and is now filling orders until the stock is depleted. The Nook is one of the strongest Kindle alternatives out there, but we think it's fairly obvious that there isn't really that much of a need to have your ebook reader perpetually connected to the Internet through 3G. Anyhow, if you've been thinking about getting a Nook with 3G built-in, now's the time.