Sonic Team has two great videos of the new Sonic games just released in Japan!
The Sonic Adventure 2 Battle page is up and running...at least in Japanese. But the important stuff is easy access anyway, despite the foreign language. When you click on the link, you'll see two batches of MPGs at various qualities. The first features great footage of both games and detailed coverage of the Chao interaction while the second sports some sweet Sonic Adventure 2: Battle multiplayer. Even with the compression and 30 fps downgrade it is obvious this port is visually more fluid.