Nintendo seems to keep releasing games, that are underscanning our HDTVs hopefully eventually they will wisen up, and make a software patch for it. Right now, for all those interested, there are a couple of lists going around which show all the major Audio Visual information. (Progressive Scan, Underscanning, Prologic, etc.)

The Audio Visual forums, have a great list going on for Wii Games

And it has also been added to Wikipedia