I just put up some details here.
We are working towards finalizing the BOM and doing another revision round of the PCB to make it even more flexible. Ultimately, the exact BOM will depend on your specific application, e.g.: the resistor values depend on what input voltage ranges you want to support, whether you need the voltage regulator or not will depend on whether you are powering from 12V or not, etc.
Official announcement coming soon. Also, Salt is open for pre-orders again until July 1st.