Adrian Holovaty (@AdrianHolovaty), from EveryBlock, cracked everyone up with "pdf's are the devil's spawns." Carol Dumaine who serves as head of the Energy and Environmental Security Directorate in the Office of Intelligence and Counterintelligence at the U.S. Department of Energy, gave a quick presentation on Energy and Environmental Security pressing the idea that environmental issues are national security issues.
I also especially liked Peter Corbett's (@Corbett3000) presentation - a 180 mile and hour review of some of their fantastic work at iStrategy Labs. The MeetUp Presentation by Scott Heiferman (@heif) was also quite interesting. The final presentation was from Michael Tiemann of Open Source Initiative and Red Hat.
Adrian Holovaty (EveryBlock), Carol Dumaine (Office of Intelligence and Counterintelligence at the U.S. Department of Energy), Scott Heiferman (Meetup), Peter Corbett (iStrategyLabs) and Michael Tiemann (Open Source Initiative)
Some really great stuff!