That sounds like the Nuance engine. That engine is quite good, and works well over the phone, with static and background noise. It does stumble sometimes though. With the OnStar system there are two parts going on: You have the "personalities" piece built on top of the Nuance Engine. The Personalities module is from General Magic. The Nuance is purely the recognition piece. I'm more impressed with the personalities stuff than the nuance engine actually ;).

Calvin