Now add in PGP key sigs (or the entire public key), website, SSL key sigs, bitcoin address, and other information I haven't thought of yet, oh, and wrap all of that inside a VCARD, it becomes quite large quite quickly.

I'm not saying for the basic info a VCARD QR Code won't work, but for more info it breaks down.

My NFC tag is simply a link to my vcard.... Well, a php file that looks like this:

<?php

header('Content-disposition: attachment; filename=klinquist.vcf');

header('Content-type: text/x-vcard');

readfile('klinquist.vcf');

?>