Munich - Olympic Stadium
Gelsenkirchen - Veltins Arena
Frankfurt - Commerzbankarena
Hamburg - HSH Nordbank Arena (formerly AOL Arena)
Leipzig - Zentralstadion
Stuttgart - Gottlieb Daimler Stadion or Cannstatter Wasen

I am just guessing obvioulsy, but venues in Munich, Leipzig and Gelsenkirchen can be taken for granted.
I cant believe they are actually playing Gelsenkirchen again instead of Düsseldorf after the 2003 Gelsenkirchen Show being 2003's Hull. Plus the sound in that stadium is the worst I have ever witnessed. I also saw U2 and Springsteen there and they allsounded like shit, whereas they sounded great in other stadiums.