I was only able to attend part of Raul's and Nik's sessions, and also the entire "open forum" session at the end.
It struck me that there didn't seem to be any open source nature to the discussion. I don't see how it would have been any different had it been a closed-source product like Microsoft Outlook we were discussing.
The DNN team said things like: "We're working on that" "We have added this new feature to version 5..." "Yes, that's something on our list for future development."
Not once did I hear anyone say "Would someone like to write that?". Or even, "we're looking for people to help write this feature...".
The DNN team seems to have tight control over the product, and I think that slows down development.
A non-profit organization like Mozilla is probably a better host for an open source project.