Since it isn't Asymmetric computing, I won't repeat it here, but take a look at the link if you are interested. (Hint: you won't be putting Atoms in your cluster anytime soon if you do floating point.)
This blog will cover my experiences and thoughts on Asymmetric Parallel Computing, including GPGPU computing (CUDA and OpenCL) and the Cell processor. By "asymmetric," I mean different code runs on the parallel cores and the general purpose cores.