I'd say mid-08 should be right.
You have Army of Two, Lost Odyssey, and Grand Theft Auto 4 for starters that should be 1m+ sellers by mid-08. That doesn't include the 5-6 titles that'll go 1m+ this year.
Looks like Assassains Creed is going to be #29 very, VERY soon.
Back from the dead, I'm afraid.