"Thanks to Chris for mentioning my project here. I had thought about posting something here, but I didn't think the PhuBar really qualified for drone status. To answer some of the questions:
Rhine: I don't sell kits but I do sell the PCBs from time…"
"Their brochure page implies that this new chip handles the rotation matrix/quaternions onboard the chip, which would take a buttload of math cycles off a main processor. It doesn't say what the update rate is, though. Invensense seems to be good at…"