The Tribes of the East product page on the Ubisoft site doesn't tell much. It does, however, list 28/09/07 as the release date. The expansion is still nowhere to be found on the major online retailers, but more preorder options should be available soon.

There is another series of screenshots on another German site. They show several cutscenes and provide a sneak peek at the dialog, which seems to include a lot of grunts and other strange noises. But hey, as long as the lips actually move...