My current GPG-Key 55597154 will expire soon and I have created a new one, which signed the old and vice versa.
Here is the current signatures:
gpg --list-sigs A1CA6A91 55597154
pub 1024D/55597154 2009-12-07 [expires: 2012-12-30]
uid Mathias Brandstetter
sig 3 55597154 2009-12-07 Mathias Brandstetter

sig 5CB7B952 2009-12-07 Mathias Brandstetter

sig 3 A1CA6A91 2012-12-27 -mat- filid brandy (Mathias Brandstetter)

sub 4096g/2C1E47BC 2009-12-07 [expires: 2012-12-30]
sig 55597154 2009-12-07 Mathias Brandstetter

pub 4096R/A1CA6A91 2012-12-27 [expires: 2016-12-31]
uid -mat- filid brandy (Mathias Brandstetter)
sig 3 A1CA6A91 2012-12-27 -mat- filid brandy (Mathias Brandstetter)

sig 3 55597154 2012-12-27 Mathias Brandstetter

sub 4096R/8FB17716 2012-12-27 [expires: 2016-12-31]
sig A1CA6A91 2012-12-27 -mat- filid brandy (Mathias Brandstetter)


and here is the pub key:

-----BEGIN PGP PUBLIC KEY BLOCK-----
Version: GnuPG/MacGPG2 v2.0.17 (Darwin)

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=33GJ
-----END PGP PUBLIC KEY BLOCK-----