You can easy generate QR-Codes with the public google api. e.g.:

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<img src="http://chart.apis.google.com/chart?cht=qr&chs=100x100&chl=http://www.pylucid.org/">

output is:

examples

permalink with QR-Codes:

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<p id="permalink">
       <a href="{{ page_permalink }}" title="permalink to this page">permalink<br />
          <img src="http://chart.apis.google.com/chart?cht=qr&chs=100x100&chl=http://YourDomain.tld{{ page_permalink }}">
       </a>
    </p>