If you're wanting to get some basic information about water cooling, then head on over to Overclocked Cafe and check out their latest article entitled Be Cool with H2O. It covers some general information to give you a little insight as to whether you think this might be for you. here's a snip:
"Okay, you've got your mind set on water-cooling, huh? You're willing to accept the jokes that your co-workers and friends will probably throw your way, like, "How many miles per gallon does that thing get on the highway?" or "Aren't you worried about blowing a fan belt?" If you're really serious, then you need to know where to begin."