OCModShop has posted a review on the Evercool CopperMan LGA775 Heatsink

There are not alot of heatsinks for the Pentium 4 LGA775, as the mounting method is very specific. Any 775 heatsink must be attached to a metal brace on the underside of the motherboard. This mechanism prevents the motherboard from warping with tension, and ensures that relatively flimsy plastic pieces will not break. This ensures a high-quality and sturdy mounting method. Evercool has manufactured a new LGA775 heatsink called the CopperMan, which is constructed completely of copper and looks to be a high-performance contender for Pentium 4 LGA-775 processors.

Evercool CopperMan LGA775 Heatsink Review