Eye-Toy = hotcake product. Not because it is a huge revolution, but because it is easy to play, and can be played by anyone with two arms (or one). I could find many a fault with it, but I'll just say its good and bad to see simple games reaching mainstream audiences, and not hearing the fanboys crying out that they have the greatest game ever.
As for the GB Camera and PD, I didn't hear about the crashing problems. I'm pretty sure that Rare could have found a way around the problem. I believe they pulled the idea because the game was reaching final development just after the Columbine shootings, whenever that was, and they thought it was a smart idea to avoid criticism (and we all know that all violence is caused by games, NOT!!!) and just take that feature out.
It's a shame that society likes to go on witch-hunts to solve their problems.
end rant