The inital draft of the profile currently suggests that the publisher of a data set will always be foaf:Organization since PSI data portals are not going to carry data created by individuals. If that decision is upheld then I suggest that rather than state foaf:Organization, org:Organization is used instead.
The two are equivalent (ORG's schema makes this explicit with owl:equivalentClass) so we're safe on the semantics - it just makes the link with ORG more explicit.
Incdidentally, I'm querying the underlying decision to restrict the profile to organisations. Might an EU funded project be a foaf:Group or a foaf:Project? Both are sub classes of foaf:Agent It's probably OK since org:Organization is quite general and does not imply legal entity status (that's org:FormalOrganization which is a sub class of org:Organization)