I am very interested. Especially about mass production costs, information about contract manufacturers/design firms for NFC components/designs friendly to startups, tech challenges in noisy (as in EM noise) and crowded (as in dozens/hundreds/thousands of NFC devices in a small area) environments, regulatory environments around the world (as applicable), adoption stories and results, security concerns.
Tags only cost about $1. If you go for volume you can reduce that cost. UHF tags used in the supply chain now (e.g. wal-mART) are 900MHz, and a whole different ballgame.
Thanks!