As my GPG-Key (actually PGP-Key as I created it with PGP 2.x) is already really old and not really trustful anymore (1024 bit, old email addresses, etc. pp.), I generated a new GPG key for my daily use. So please update your keyring with my new key. You can delete my old key (0x25dcaed0) and import my new key (0xda5cd8ef). The fingerprint of my new key is: 957A 0EE9 CB77 D6CD CBB2 E1F9 DA77 8FCA DA5C D8EF. This new GPG key can btw. also be used for encrypted communication over my new jabber account.
The public key can also be downloaded directly from my blog: http://blog.pebcak.de/uploads/winfriedneessen.net.asc
Additionally I've finally added a "contact" page to my blog, with several different ways to reach me. Find it here.