[zoson]

I think the real issue at hand here should be, if you need a waterblock the size of a standard heatsink, why wouldn't you just use a standard heatsink?

This seems like a terrible idea to me. At least with a standard heatsink the ONLY thing that can fail is the fan. With this you're needlessly adding system components to get the SAME results as a standard heatsink.

Think about the whole nature of water cooling. Most of us do it to move heat away from the processor faster than a standard heatsink can. And if you take into account the argument above that as processors are developed they become cooler (which I do NOT agree with at ALL), you would be able to use a slow and quiet fan, negating any argument about noise. Why risk having water in your system for no performance gain at all?

.02
-Zoson

Edit: I also dread the thought of running electricity through my coolant, which runs through (in most cases) more than one type of metal. Yay for corrosion! Not to mention one of those metal components is your waterblock sitting on a VERY sensitive and tiny block of several million transistors. I'd hate to be a transistor owned by someone who uses this pump in his cooling system.