Hey memset, thanks!

NFC is a subset of RFID which works over closer ranges (hence the term "near-field"). The other difference is it can be passive (i.e. the reader induces a current in the tag/sticker to read it, that's why the tag doesn't need any power).

13.56 MHZ readers should work. We're ordering cheaper reader-writers (~$50) and will put them on the store soon. In terms of sourcing, we get them in bulk. We basically tested all the suppliers for quality, speed, and are working with the best ones. Who knows though, buying a factory may be in our future.

Have a read of our About NFC page: http://www.tagstand.com/pages/about-nfc and our FAQ http://www.tagstand.com/pages/faq

and if you have any other questions, let us know!