Lifehacker reader Steve Price had a two-fold problem. His previous desk was short on space for all his monitors and the noise and heat generated by having all his computers under the desk was unpleasant. By taking advantage of an alcove in his computer room he was able to cut down on the heat and noise substantially.
He built a custom cabinet to fit into the alcove and hold his computers, some peripherals, and tools. The entire affair is cooled with large-diameter cooling fans and the heat is exhausted right out the window.
The Computer Cabinet Office [Lifehacker Workspace Show and Tell Pool]