I recently did a talk at 1DevDay Detroit (http://1devdaydetroit.com) on Open Source and the Community. It was a great event and if you live in the greater Detroit (MI/OH) area, I'd recommend you look into attending next year. Lots of great sessions and wonderful attendees. Here are the slides from that presentation.

http://www.liferay.com/documents/5075192/11538079/1DevDay+-+Open+Source.pdf