Luigi returns in Super Mario Galaxy 2! You can find a good bit of footage after the jump, but most of it we have already seen before with Mario.
While playing as Luigi is fine, I hope he gets some unique stars to collect. I personally like Luigi better anyways, but that is another story.
Transmission 8 marks the half way point to the 16th and final video. The next video will be uploaded on the 7th. Super Mario Galaxy 2 launches May 23rd in North America.