My repository is now signed. So you maybe see the following warning when running apt-get from Debian Etch or Sid or Ubuntu Breezy:
W: GPG error: http://debian.wgdd.de unstable Release: The following signatures couldn't be verified because the public key is not available: NO_PUBKEY 0F719C35E394D996 W: You may want to run »apt-get update« to correct these problems
Please read the related information about how getting my key under Archive signing key.