Hi as part of the work on the Networks API - I added Quantum support to the ruby-openstack rubygem that our OpenStack driver uses. I have a pull request @ https://github.com/ruby-openstack/ruby-openstack/pull/23 - I'd appreciate a review if someone has the time. As maintainers of ruby-openstack, we try to follow the same ground rules there for patches (needs to be acked before push) as we do here with Deltacloud.
I have some notes on how to test this out @ http://mariosandreou.com/cloud_API/2013/03/21/ruby-openstack-quantum-support.html - obviously you need an OpenStack setup with Quantum deployed - (Michal has such a setup but unfortunately, it is RH internal only - ping me for details). thanks, marios