NASA just took more pictures of the face in 2001. They are very high-resolution, and look more like a mound of dust than anything else. Of course, the theory is that the face is a structure, and that it is covered by about 10,000 years worth of dust. None of the pictures really work toward either sides of the argument, and likely never will. Sort of like how one person sees a cloud and another sees a two-headed elephant. The only way that we can ever be sure is to go over there and dig the thing up, which would likely be labeled as a massive misappropriation of funds. However, there is actually a second face that is half destroyed but still recognizable, and a "city" of pyramids not far from both sites. This further fuels the Mars/Egypt connection theory (both faces look a lot like the sphinx). Here are some links:
http://www.planetarymysteries.com/egypt/sphinxmars.html
http://www.qtm.net/~geibdan/cydonia.html
http://science.nasa.gov/headlines/y2001/ast24may_1.htm
http://www.zuko.com/Mysterious_Planet/Cydonia_Mars.htm
http://members.aol.com/jccunn/index.htm
http://www.mufor.org/cydonia.htm

This should be sufficient to cause conspiracy theorists like ourselves to run through the streets screaming, "Oh god, I understand!!"