Hi Goldie,

to IIS, mate.
The moon showing only one face to us is a phenomenon called 'tidal locking'. It is somewhat unique that its period matches its day so well. I would say it is a feature of the formation of the Moon with the current popular theory of the formation of the Moon being the result its formation being due to a catystrophic collision between the Earth and another body similar in size to Mars.
The Moon shows about 59% of its total surface to us due to a rocking motion called 'libration'. The link below is stunning in how this rocking manifests over one Lunar day:
http://commons.wikimedia.org/wiki/Fi...2007_450px.gif
I vaguely remember that the are a couple of other Moons, either of Jupiter or Saturn, or both, that show this tidal locking. I'm not entirely sure today. Good question.
There is one, almost creepie, Lunar feature called Mare Orientalis, the Eastern Sea, first identified with the first Soviet lunar orbiter that showed us the far side of the Moon. Due to libration, Mare Orientalis is just visible to us, but not really identifieable as seen in orbiter photos.
That the Moon appears as big as the sun is also a freakish coincidence. But this too fluctuates as the Moon's orbit around the Earth isn't cirular. When it is at its furthest, the Moon appears to sit within the Sun's disk, making the Sun's appear bigger than the moon. This is called an 'annular eclipse':
http://www.hampsteadscience.ac.uk/as...-03_pearce.jpg
Mental.
Mental.