<li>Importing existing keys will be stripped of certificates right now</li>
<li>Key cross-certification is NOT supported, so signing with those keys will get a warning when the signature is checked.</li>
<li>K9 Mail integration not implemented</li>
</ul>
<p>If you want to contribute, fork it and do a pull request on Github: <ahref="https://github.com/dschuermann/openpgp-keychain">https://github.com/dschuermann/openpgp-keychain</a></p>