I received this from a semantic web mailing group that are currently in the process of setting up Sem Web/RDF standards for the Health care / Life science domain (public-semweb-lifesci@w3.org).
This could prove very useful regarding the proposed Brain Atlas work, as well as more general microscopy applications. They do not explicitly mention the Open Microscopy Environment (OME, http://www.openmicroscopy.org/), but it is probably relevant to them and us as well.