Since Christmas, my wife and I (playing co-star mode) have been steadily moving along through Super Mario Galaxy. We've only just beaten the Honeyhive Galaxy, though.

If anyone is interested, though, my Super Mario World project thread will be available for viewing for the short-term future, at least (see my signature or go here). The forum that is hosting it is in the midst of upgrading (sound familiar?), so posting is disabled there. I would love to hear what you fan editing folks think of a project like this, since it has much in common with some of the things done here.