Those folks over at Cubed3 have spotted something rather interesting on the Official Wii website. More specifically on the Super Mario Galaxy page, it's now listed as 1-2 Player. Bet you didn't see that coming
"The ultimate Nintendo hero is taking the ultimate step out into space. Join Mario as he ushers in a new era of video games, defying gravity across all the planets in the galaxy. When some creature escapes into space with Princess Peach, Mario gives chase, exploring bizarre planets all across the galaxy. Players run, jump and battle enemies as they explore the many planets. For Mario to succeed, gamers will press buttons, swing the Wii Remote and Nunchuk controllers and even use the Wii Remote to point at and drag things on-screen."
Spiffing, but alas no release date... Nintendo inform us that the title is still due to ship this year, lets hope that's true!