@FishyJoe:
Not to go too far OT here, but Wii will quickly be catching everything in 5 million sellers when you do count Wii Sports and Wii Play.
PS2 had 13 five million sellers... Wii has only 3 right now, but that will turn into 9 or 10 by year end:
Wii Sports; Wii Play; Mario Galaxy; Zelda: TP; Mario Party 8; Mario and Sonic at the Olympics; Super Smash Bros. Brawl; Wii Fit; Mario Kart Wii; Animal Crossing Wii
AC is the only question mark. Unless its delayed, I'm expecting it to be a late year release in Japan / early 2009 in Europe and America, in which case it wouldn't hit 5 million until 2009. But the other 9 are pretty safe bets at this point.
"[Our former customers] are unable to find software which they WANT to play."
"The way to solve this problem lies in how to communicate what kind of games [they CAN play]."
Satoru Iwata, Nintendo President. Only slightly paraphrased.
