At Ad Limina Apostolorum, Jamie is blogging daily on the events of World Youth Day in C0logne. (HT: Siris) Perhaps we can teach him how to order a beer: "Köbes, dot ehr mer noch e Kölsch?" (Unfortunately, the Brauhäuser are expecting a sobering week).
The major city newspaper, Kölner Stadt-Anzeiger, has lots of photo galleries. Just look down this page to wherever it says Fotoline. The Kölnische Rundschau also puts up a few pics.