Metadata, DITA 2.0, and requirements gathering

We've talked about metadata and DITA 2.0 several times.
What sort of assessment and requirements gathering do we need to do?
How can we fruitfully discuss what about metadata seems to work -- and NOT work -- for implementations using DITA out-of-the-box?

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Best, Kris Kristen James Eberlein Chair, OASIS DITA Technical Committee Principal consultant, Eberlein Consulting www.eberleinconsulting.com +1 919 682-2290; kriseberlein (skype)