The websites of the German Consulate in the U.S. and the UK have a great deal of information available and can be contacted for any further questions concerning your move.
Update: Jan 2014
The websites also provide a link to TUV. TUV inspects foreign cars to make sure they meet German standards. This is an invaluable source if you are planning on bringing a non-European manufactured car with you to Germany, or a car that was made prior to the Certificate of Conformity.
Living and working in Germany
Studying in Germany