Occasionally I talk at conferences or community groups. Sometimes I even have slides 
- May 2003 - Spoke at the Intel 802.11 Summit about mobile devices and Personal Telco.
November 2002 - Spoke at the SydneyWireless monthly meeting about PersonalTelco and the state of community wireless in the USA.
September 2002 - Spoke at the Dunedin Linux Users Group monthly meeting about community wireless. See DunedinWirelessTalk
August 2002 - Spoke at Defcon X with Bruce Potter and Tony Kapela about on Wireless Security and how it effects community networks.
June 2002 - Spoke on the "Deploying Public Networks" panel at the Seattle EyeForWireless conference.
June 2002 - Gave a presentation at the PortlandLinuxUsersGroup first Thursday meeting.
May 2002 - Spoke at the O'Reilly Emerging Technology Conference as part of the "Community Wireless Round Table".
January 2002 - Spoke at the second Community Wireless Summit meeting hosted by SeattleWireless.
December 2001 - Gave presentation titled "Community Networks: What You Should Know" at EyeForWireless conference. See it here.
September 2001 - Gave short presentation on the basics of WirelessCommunities at the ItecConference.
July 2001 - Spoke at Defcon9 with Bruce Potter of the ShmooGroup about Wireless Security and CaptivePortals.
June 2001 - Organized the first meeting of various community networking groups from all around North America for the WirelessSummit.