There have been plenty of games to hit 1m or near 1m their first week.
Halo 2, GTA:SA, and a few others have hit 1m for their first week.
For this year, we'll probably have more than ever that hit 1m in 1 week.
Possible 1m for their first week games:
Super Mario Galaxy
Super Smash Brothers Brawl
Halo 3
Grand Theft Auto for X360
Madden 08 for X360 (maybe)
All of those games, expecially the first 4, have a great chance of hitting 1m their first week. I'd anticipate the list would go something like:
Halo 3
Super Mario Galaxy
Grand Theft Auto IV
Super Smash Brothers Brawl
But it could depend. GTAIV and SSBB should both be pretty close.
Back from the dead, I'm afraid.