I also thought Sega was completely crazy when they said they were looking for 4m sales (Wii + DS) last year. Guess they showed all of us.
Scaries comparison: Mario and Sonic at the Olympics has outsold Grand Theft Auto IV (PS3) by more than a million copies! There's every reason to believe it will end this year with higher sales than either single version of GTA4, 360 or PS3. No one would have believed it...
End of 2008 totals: Wii 42m, 360 24m, PS3 18.5m (made Jan. 4, 2008)