The German government has agreed to donate 100,000 images to Wikimedia. They will be licensed under CC BY-SA.
Starting on Thursday Dec 4, 2008, Wikimedia Commons will witness a massive upload of new images. We are anticipating about 100,000 files from a donation from the German Federal Archive. These images are mostly related to the history of Germany (including the German Democratic Republic) and are part of a cooperation between Wikimedia Germany and the Federal Archive.
These images are licensed Creative Commons Attribution ShareAlike 3.0 Germany License (CC-BY-SA). Wikimedia Germany and the Federal Archive have signed a cooperation agreement that, among other things, asserts that the Federal Archive owns sufficient rights to be able to grant this kind of license.
The images are 800 pixel in size on the longer side.
Too bad not all governments PD their IP like the US.