SoCal 2000 Teslathon - Large Teslathon in Southern California. Lots of pics. - http://www.brianb.org/tesla.htm
The Geek Group - Michigan based sci-tech group. Teslathon reports, pics and videos. - http://www.thegeekgroup.org/
TCBOUK - Tesla Coil Builders Of the UK. Excellent photo and video archives of their Teslathons going back to 1998. - http://www.tcbouk.org.uk
TCBFW - Tesla Coil Builders of Fort Worth. Very active group, hundreds of excellent still images. - http://www.hot-streamer.com/ross/TCBFW/TCBFW.htm
Ross' Biggg Coil Roadtrip - Expedition to visit the world's largest amateur built Tesla coil. Great pics. - http://hot-streamer.com/ross/Biggg/biggg.htm
NorCal 2001 Teslathon - Teslathon at Hunter's Point in SF. Lots of pics and videos - http://hot-streamer.com/TeslaCoils/Misc/NorCalTeslathon_July_2001.htm