Well I found it to be useless.
Cooling the (southbridge in my case with the nForce 3) using my watercooling kit only added heat to my loop. I found that using my MCX159-R I attained the same FSB speeds while not adding un-neccessary heat to my loop.
I use a Dual Loop setup. Both are with Thermo-electric Swiftech Blocks.
I'm now in the process of switching the MSI K8N Neo2 Platinum for another nForce3 the Gigabyte K8NS-Ultra 939.
Basically It's only useful for HUGE gigantic OC's..lol. Like the ones MACI does.