Quick suggestion. The SPI going into the lower right corner uses the same SS pin as the one on the top left. If you used a different IO pin for the bottom one, it would be possible to use both at the same time without having a jumper wire on one of the sheilds.And yeah, the name breaches intellectual property laws on the olympic trademark.
I know. It's the same answer you gave on one of the other cross-posted threads. Doesn't change the fact that if you attempt to market them, and are discovered, you will be in trouble. Both the rings symbol and the word Olympic are legally protected.http://www.london2012.com/documents/brand-guidelines/guide-to-protected-games-marks.pdf
I think olympic is just a work. As for the logo, may have legal issues,