Lessons Learned
RDF and OWL as general information models are applicable to many uses (many of which we never even thought about)
Common data representation and architecture drives down (technical / social) costs
Facilitates serendipitous interoperability - breaking down the barriers of domain knowledge
When "Anyone can say anything about anything", who you trust is important
Beneficial to solving interoperability in Open (rather than Closed) systems
Closed systems are becoming more and more Open - addressing these issues now is cost effective in near, middle and long term