Monster Hardware has the DTek TC4 Waterblock up on the review table today.
It looks like a nice block, check out what they though about it here.
DTek has brought a few refinements to the game by using a large copper base
plate, turbulence inducing channels and turbulators wire
assemblies within the channels designed to stir up the water and create even
more turbulence; this exposes more of the surface area of the water allowing
for more efficient cooling.