(I know it has been asked before, but I thought I'd check in again..)
Has anyone had any success implementing the Dallas one-wire protocol on the NRF51822 - in particular with the DS18B20 temperature sensor?
No, the one referenced in the bspacm package is still the latest available publicly. In January I'll be back to working Nordic stuff, and at some point will have nRF52 support in C++17.