The Japanese promotional website for Super Mario Galaxy 2 was just recently updated with four new game play videos. You can check them out by clicking on the link in the last sentence… or here.

The first one shows the Bullet Bills and Dark Marios. The second one shows brief clips from various levels. The third one shows Mario climbing up a tower or something, and the fourth one shows a boss battle against a huge piranha plant. Are you excited? I am.

Source: IGN