Yes, NFC should work great - although I haven't done anything with it so far. I've been meaning to for a while though so I have just ordered a kit.
Personally I wouldn't use Xadow - it had weird connectors. I'd just use one of the many other things that use the same chip and are cheaper: http://www.ebay.com/sch/i.html?_nkw=PN532+nfc
Espruino is a JavaScript interpreter for low-power Microcontrollers. This site is both a support community for Espruino and a place to share what you are working on.
Yes, NFC should work great - although I haven't done anything with it so far. I've been meaning to for a while though so I have just ordered a kit.
Personally I wouldn't use Xadow - it had weird connectors. I'd just use one of the many other things that use the same chip and are cheaper: http://www.ebay.com/sch/i.html?_nkw=PN532+nfc