Haven't heard that name in a while, he really was not in the spotlight much with Atari, if he even lasted long there at all.
I thought he had a great vision and was the big factor behind getting LittleBigPlanet on PS3 , but he wasn't different from the rest of Sony executives at the time. Meaning he seemed fanboyish and overestimated PS3's capabilities on almost every corner.
Could be a good fit with Microsoft though, definitely can't blame them for giving him a shot, hope it works out for everyone.