I can only agree with Petra Tursky-Hartmann - the way this nonsense was pushed through is terrible. Really terrible. Pure activism without any real meaning - but you feel so terribly safe when everything is properly recorded and archived. The whole data waste doesn't provide any information - on the contrary, it will cause trouble. But who cares if citizens soon get into trouble because viruses or spam with forged sender addresses are sent to random addresses, and then a citizen of Arab origin is considered a terrorism suspect. It doesn't matter, it doesn't affect good German citizens.
And we are still allowed to drive faster than 130 on the highway. We are free.
Addendum: At XS4ALL there is a nice Lifecounter, which counts how many CDs are necessary for storing the email log data since September 2005 ...