R.I.P. Mr Iwata.
So that's why he didn't come to E3. They said he was busy but probably he was very sick.
He worked on some of my favourite games I'm sure. The mother series and possibly Eggerland (he worked for HAL before Nintendo). Some quick googling turned up this list http://nintendo.wikia.com/wiki/Satoru_Iwata
but in most of it he is just the Executive Producer.