1) From both a hardware and software perspective, Nintendo is pretty much carrying the entire industry at this point. If it wasn't for Nintendo, things would look pretty grim.
2) Given the success of the DSi, I've no doubt that the DS will easily sail past the PS2 and become the best selling video game system ever.
3) Even though the Wii numbers aren't as astonomical as they have been, it still outsold the 360 and PS3 combined. Furthermore, the Wii also did better than PS2 ever did in April. (The biggest number PS2 ever did in April was 330,000 back in 2005.) It's amazing that the Wii can have a YOY drop of 50% and still outperform the PS2 at its peak. All this "doom and gloom" surrounding the Wii is laughable.
4) The PS2 outselling the PS3 at this point would be akin to the NES outselling the SNES in 1994. In other words, it's something that simply shouldn't happen. Those numbers have to be pretty painful for Sony.