Seems like yesterday, German Google users were unable to access any of the Google properties including Google.com, Google Mail, Google Groups, Google Reader and so on.
Reportedly it impacted both Telekom and 1&1 users. Google Blogoscoped is based on Germany and has a lot of details on the downtime. In fact, he received a statement while Google was offline in Germany that translated into:
Apparently this afternoon there were problems with accessing Google through a provider. We are currently investigating the causes and hope that users will soon be able to access Google as usual.
There is also a huge thread at the Abakus German Forum that has tons and tons of German SEOs talking about the downtime. It seems like it was fairly serious. But it is not working.