Yesterday I created a new PGP/GPG-Key for secure communication.
The default gnupg keys are 1024 bit DSA (Data Security Algorithm, based on the discrete logarithm problem). According to studies by famous cryptographs like Dan J. Bernstein or Adi Shamir, keys with 1024 bit for public key encryption based on factorisation or the discrete logarithm problem might be unsecure. Large institutions or companies with several millions available might be able to create special hardware to break such keys.
See http://www.cryptolabs.org/rsa/ for details.
You can get my new key, Key-ID --------, here. It is signed with the old one.