Ninja blocks is what we call a “value add”. If you build a product using say the BeagleBone and you tell the world it is a BeagleBone and promote it as such, then we would consider you for a value add arrangement.
We also have an arrangement where you can buy a board without the logo, making it your product, from the same company that builds the BeagleBoards. Based on the open source license, you can do whatever you want with it, but it is your design and you are totally responsible for it working in you application. It is also not covered under the BeagleBoard.org RMA support or warranty.
Gerald