just some random thoughts - If you want to do CPU mining with poclbm you will still need openCL - pocl is an OpenCL miner, and your CPU supports OpenCL just fine. I suppose you install the nvidia openCL support, as it is already integrated into pyOpenCLs requirements on linux, and its a way better implementation than AMD's.
On the other hand, if you're going for CPU mining, the most efficient thing you _can_ do is use ufasofts CPU miner. This one is highly optimized for working with a CPU, does NOT require OpenCL, and it can in everyday use bring you about a 100% speedup versus traditional non-opencl CPU miners, and about 150% more than an OpenCL CPU miner. Note that opencl is just an abstraction layer to abuse generic devices for computing purposes. So it will always be slower than a target-optimized miner(like that one from ufasoft). If you like ufasofts miner(see in this subsection of the forums) I'd suggest you donate some small amount of BTC to the developer.
Nice, the ufasoft miner does work well, I'll certainly donate once I gather some coins.
One last question though, the ufasoft application also uses AMD CAL if it detects a Radeon GPU. But if the computer has a GeForce, will the miner know not to try to use the Nvidia GPU?
Thank you for the help!