Hi smith4c, everybody else,
This seems like one of those problems which affect a lot of people but nobody seems to have a clear answer to. This is the only thing that really bothers me about Apple products. Although I can't say of this problem is more frequent than all the problems connected to the infamous 'Graphics Update', it is sure as annoying! So anyone that has any influence: please, help us!
I experience this symptom too, but not always before my trackpad starts freezing. I sometimes have difficulty double-clicking. The weird thing is that when I attempt a double-click using two fingers, the mouse seems to be 'stuck' for about a second.
It seems that the mouse- and keyboard freezing is mostly caused
after I wake my macbook pro up from sleep. Most of the time, this is when I have just connected or disconnected my external screen, keyboard and mouse. This could affect the problem, although I'm not sure. Usually, after a reboot the problem is gone.
By the way, I have only seen the GSOD once since I bought my MBP in November, so everyone strugling with this: good luck