Middle-aged geek. Prez of @hearsparkbox. Founder of @brworkshop.
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United States United States, Atlanta
19th–20th October 2012
Ben Callahan spoke
United States United States, Dallas
24th–26th September 2012
Ben Callahan tracked
United States United States, Richmond
24th–26th September 2012
Ben Callahan tracked
20th–21st September 2012
Ben Callahan spoke
United States United States, Grapevine
20th–21st September 2012
Ben Callahan tracked
16th–19th September 2012
Ben Callahan tracked
United States United States, San Francisco
11th September 2012
Ben Callahan tracked
7th September 2012
Ben Callahan tracked
Switzerland Switzerland, Zurich
6th–7th September 2012
Ben Callahan tracked
5th–7th September 2012
Ben Callahan tracked
United States United States, Columbus
4th–6th September 2012
Ben Callahan tracked
29th August 2012
Ben Callahan tracked
28th August 2012
Ben Callahan spoke
United States United States, Chicago
27th–28th August 2012
Ben Callahan tracked
United States United States, Grand Rapids
23rd–24th August 2012
Ben Callahan spoke and was involved Organiser
United States United States, San Francisco
21st–24th August 2012
Ben Callahan tracked
United States United States, Pittsburgh
16th–17th August 2012
Ben Callahan spoke and was involved Organiser
United States United States, Cleveland
13th–14th August 2012
Ben Callahan spoke and was involved Organiser
United States United States, Alexandria
6th–7th August 2012
Ben Callahan tracked
United States United States, Pittsburgh
3rd–4th August 2012
Ben Callahan tracked