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Waves. Not sure if we cross paths at the Buddhist Center on Second Life.
Yes, the two sides work together. There are very real problems handling information if the corpus callosum (that links the 2 hemispheres) is severed. But in terms of brain-function studies done with meditators, it is the right hemisphere that is active when one is in a meditative state.
(speaking from both personal interest in this area of science as well as university courses in neuropsychology and neurophysiology)