I've read that a new version of EROS has been released under the GPL. While still in a early state, EROS is a microkernel OS which has some interesting possibilities : - it use a capability scheme for security - it has orthogonal persistency i.e. by default everything is persistent.
See http://www.eros-os.org for additional information. I would like to know what you think about EROS ? Please note that I'm NOT trying to raise a discussion about which microkernel is better, or trying to raise a flamewar, it's just that the opinion of people more knowledgeable than me in microkernels should be very interesting. So, what's your take, what do you think are the upside and the downside of the EROS approach ? -- Renaud HEBERT

