I know poi is po-importance but wats poa?
I think it is NodeCoin, but as far as I know it isn't up and running.
ah proof of activity.. i dont see that getting very far.. iirc they are having serious issues and distribution was a big problem. sock infestation and large whale purchases during the auction. tanked after launch and still no open source/white paper(i think). i dont think they will be any competition for nem's poi.. they launched waaaaaaaaaay to early.