A couple of times today I've been on and found that voice was enabled. Going over to a shell window and running "top" showed that SLVoice was eating all the CPU cycles on one processor core. I disabled voice... and SLVoice was still running. I exited the SL client... and SLVoice was still running, and now using up almost all the CPU cycles on both processor cores. kill -9, and away it went. Good riddance.
The SL client uses enough of my computer already.