I think the thing with using Sony cameras, is all about money.
I bet Sony'll pay a shitload to sega for it.
+Sega pulled back from the hardware market, remember?
As for the EyeToy camera, it's 1 of 3 possible models.
Two which are registered on a computer as a Logitech cam, while the last one is just registered as the "model name/subtitle" of one of the 2 other Logitech cams...
Now why the heck is Sony using a Logitech camera?
Also, there's one BIG mistake sony made when they made the eyetoy (how it work in the current games)
The movement/triggering system is based on motion in the image the eyetoy sees.
Now, if they made it so you took one snap first, of just the background (without any persons/moving objects in it) and basicly just locked that image in the memory of the PS2.
Then, that picture could be used as a refferance picture for "changes".
This will basicly open the possibility to increase the motion detection system.
Only thing is that the refferance picture must either be used combined with the entire new moving picture, or the "character zone" in the middle of the picture must be an "empty zone" where the camera doesn't realy care about what happens at all...
EyeToy is a fun little thing, but if you ask me, along with a DDR + dancepad, it's just another thing to keep girls occupied infront of their boyfriend's console.