Does exactly what it says on the tin. It turns the expansion headers on a Sanguinololu 1.3a into the expansion headers found on a RAMPS board / RepRapDiscount Smart Controller. Why the fuck this doesn't already exist is beyond me.
It was strangely difficult to piece this together. At the very least, this *will* work with a RepRapDiscount SmartAdapter. It's unknown if it will work with the I2C display I have coming from China. If it doesn't, who cares, this board cost less than $10 to send to oshpark.
"Why the fuck this doesn't already exist is beyond me." I have that same first thought for far too many PCBs