Copy/paste courtesy of @Steven.Carr. These are in-progress files, so don't go spinning up 1000 of them and expect nothing to change. :)
Files are up on Github here.
VISP-BREAKOUT is a small single sided breakout board with the 4 sensors in the right places brought out to SMD pads for soldering wires
VISP-I2C-DUAL is a small board with 4 sensors, and a 6-wire interface. 2-channels of I2C and VCC+GND
VISP-I2C-MUX is a 4-wire I2C interface with a I2C bus multiplexer to switch between the 2 sets of I2C sensors
VISP-I2C-XLATE was our first design. Single 4-wire I2C interface with all of the sensors visible on the same bus
VISP-SMART is a unreviewed completely 3v3 design with an atmega328 on board and useful pins brought out to SMD solder pads on the back.
VISP-SPI is an 8-wire interface to the sensors, using a 3-to-8 decoder to convert A0:2 into a Chip Select (where address 000 is unselected so the bus can be shared. 8 wires so an RJ45 jack can be used at the core controller for connectivity)