It's a tribute to the strength of Group B that Loew has waited until the first knockout round to rest his attackers: Gomez, Podolski and Mueller have given way to Klose, Schuerrle and Reus. Karagounis and Holebas are suspended for Greece; Ninis is on for Gekas.
Found an interesting article on the renaissance of German football. A lot of people here have given Klinsmann the credit for that; I've tended to primarily credit Loew. But the real driver was an unknown DFB functionary named Bernd Pfaff, and the go-ahead was given by, of all people, Berti Vogts.
I've long had the theory that the strength of a national team ultimately depends on the effective size of its pool of players, which I suppose means the number of youth players who, if they were talented, would be discovered and given the training necessary to develop that talent. Pfaff implemented a plan that increased Germany's effective pool about a hundredfold. It's fascinating reading. It's also in German, of course. I hope the online translation tools treat it kindly.
Anyone interested in seeing what it would involve to push US soccer to the top should take a look.
DFB Der Plan von der Abschaffung des Rumpelfußballs