I get blue screens too, caused by the EyeX USB driver (uninstalling the 3 Tobii drivers resolves the problem, reinstalling brings it back).
It happens about 1 out of 2 times when my laptop goes to sleep (and only then). No messages in the event viewer (other then, hey, I’m going to sleep now, and next, hey, what happened?). I have checked the mini code dump and there is some evidence that points to USB drivers.
Windows 7 SP1, 64bit, latest version of all eyex software drivers (previous versions had the same issue).