AnandTech is working on a new project named the Bench, currently it enables you to compare the performance of dozens of processors. For instance, you can check how the Atom measures up against 34 AMD processors and 36 Intel processors across 18 benchmarks.
You can check it out over here.
A few months ago I launched something we quickly titled "Bench". The idea behind AnandTech Bench is that it's a publicly accessible version of the database of benchmarks we've run internally. You can currently compare 34 AMD CPUs and 36 Intel CPUs in the engine across 18 benchmarks. I'm working on adding power data as well.