why is it next to pointless? i wouldnt expect my gig of corsair pc3500 to last very long with 3.2v Vdimm like some people have used without proper cooling. currently using the timings and fsb and voltage im using (2-2-2-12, 220fsb, 2.9) i *need* to have a fan resting on the heatspreaders or they will *fail* in memtest86 with quite a few errors. the fan keeps them cold enough to work without errors.
heatspreaders though are different - they are pointless. firstly becuase they dont even make contact with the whole of the ram chips, just the middle. second because there so thin - they dont disapeate heat quickly becuase they lack in surface area, they dont really help ram *when* the ram needs it (when its over-volted), therfore the stock heatspreaders are for two resons, to make it look better and also to hide the chip's details unless some vioding of warrentys is done
cheap easy ram cooling would be done by 15mm copper pipe running along top of your rams, with flattened copper pipe soldered to it making full contact with the chips. there isnt realy anyway to make a mmore compact cooler with water, whilst also using 1/2" pipe flowrates (so it can be ran inline with the rest, no need to run it parrellel).
it would be difficult to cool two or more sticks of ram like this, and doublesided ram sticks would also be far from easy