Cross over media is some of my favourite type of entertainment. It allows you to get the best kind of jokes and humour from two different directions. Of course at the same time It's also the ultimate way to alienate people since it's noting but hardcore inside jokes.
Anyway I was avidly awaiting the advent of the game MGS4. Since I also own and play the game Little Big Planet this ad not only appeals to me, it also makes me laugh. This is a good example of well done cross over humour.