Some users discovered, upon receiving their new Nook Tablets a little early, that only 1GB of the Nook Tablet’s 16GB of internal storage is available for non-B&N purchased content. This makes the larger internal storage of the Nook Tablet (one of its much-touted advantages to the Kindle Fire) pretty gimped.
Due to the Nook Tablet’s expandable storage, it’s not the end of the world. But it pretty much ups the entry-price on the device to include the cost of a microSD card. B&N also says that they will be working with partners and 3rd-party vendors to allow them to use some of the space currently reserved for B&N-only content.