Here are some great links about German brewing.
Braukaiser – Kai Troester’s excellent discussion about German Brewing processes.
The Quest for Edelstoff – one man’s quest to reproduce Augustiner’s finest
Roachbrau – Steve Roach’s blog on German Brewing
German beer tours with Ron Smith, an excellent experience to learn about and enjoy German beers. (Ron also does Belgian beer tours as well)
Mayfair Court Brewhouse – Ken Lenard’s great site about German brewing and his recipes
German Beer Institute – discusses the variety of German beer styles.