You have to really work at it to image a precise point like "the face" with the MGS. The MGS high resolution imager takes pictures that are a few kilometers wide by several kilometers long (size varies depending on the resolution). You can only take a few such images per orbit before filling the memory buffer. Unless you just happen to fly directly over the "face", you have to tilt the MGS off vertical by a very precise amount, then begin and end the image precisely. The tilting can disrupt other experiments, so it isn't something done lightly.
Through the entire projected life of the MGS, I doubt if 1% of the Martian surface will be imaged at high resolution. Given that, I personally believe they've wasted enough time on the "face". It's just an eroded mountain, after all.
Space/Science » in reply to re: Latest ? may 24 2001 is considered "latest"?
It's not exactly a high priority target except to the cranks