On Jun 27, 7:12 am, Michael Turner
wrote:

Both are problematic for water supply, but Mars has ice caps, at
least. The Moon? Over the long run, the cheapest place from which to
fetch water for a lunar base might actually end up being Phobos, ...

That was my opinion until a few months ago.

Recently Chandrayaan 1's mini-SAR radar seems to indicate thick ice
sheets at the lunar poles.
http://blogs.airspacemag.com/moon/20...e-of-the-moon/
http://www.nasa.gov/mission_pages/Mi..._deposits.html

And LRO has recently given additional confirmation. This article was
posted July 1, 2010:
http://www.onorbit.com/node/2335

600 million tons at each pole. Sheets 2 or more meters thick.