I'm kind of proud of this: Radboud University Press
@Erik Good question: Not sure... There's an Amterdam University Press and a Leiden University Press, but they're only partly into open access (but also into digital rights management and/or article processing charges)
@djoerd Wow, very cool! Do you know if there are other universities in the Netherlands planning something similar? Or is it then better to join efforts via the 'Universiteiten van Nederland' (VSNU)?