Interesting... I hope you don't mind a little constructive critisism... I am a little concerned about the water lines that have joins being directly over the top of the PSU, if those guys spring a leak you could wind up getting electrocuted.
Some of the info may not be relevant for everyone, so I would probably use links to it for easier reading i.e the relay.
Maybe a slightly larger text and larger clearer photos.
But on the whole I thought the article was well laid out and informative, maybe a little more info depending on how new the person was.
Looks pretty good, you should check the site in Netscape 4.7x, you will be surprised about the font issue between 1 and 2 pages.
One point, you have a mixed metal system; copper waterblock, aluminum radiatior. With this setup you might want to think about adding 10-20% antifreeze to prevent electrolysis. 10% waterwetter is a bit overkill, it has some anti-corrosion properties but antifreeze works much better. Bump it down to 1-2caps/quart on the waterwetter and 10-20% anitfreeze. Glad to see that you are using distilled water though. Good job.
You've got the right idea, but being a stickler for details I have some comments....
1. Check you gramar and spelling. I saw quite a few typos.
2. Expound on problems you encountered to help others avoid them. I saw one sentence about you crushing your CPU. This is a serious issue, yet I saw no further details explaining how. Also, something about the molex, relay, and noise. I'm guessing your meaning don't hook up anything besides fans or pumps to the molex coming from the relay as the 120V AC is causing a little noise in the relay?
3. Include part numbers in your parts list.
4. How about a few before and after temps. Make sure to be detailed including room temp, case temp, etc.