It should be suffice to say that both projects are going to continue to co-exist and probably going to be rather similar for quite some time. We don't want any bad blood between us and we are going to try to work together towards our common goal. We on the ChiliProject side just feel that more open and engaging development process helps the product and is more fun for all participants.
While I certainly don't want to stir the pot, I do see a bit of irony in that a stated goal of ChiliProject is transparency but there isn't a lot of transparency on why the fork was created.
I fear bad blood will be inevitable as developers/users pick their sides. All that being said, I wish your project the best and I will be looking in from time to time to see if we might revaluate our issue tracker.
Eric has written a lot about redmine and does consultancy about it so I guess that after investing so much on redmine, the only option left for him was to fork it.
I've been planning on offering redmine as Saas for a while at http://redmined.com (yeah, there's a lot of people doing the same already, I know) but maybe I'll move to chiliproject if the fork goes well.