Any photo involving off-camera flash or strobe. The photo can be of any family friendly subject material, in the studio or on location. Comments, description, or tags must include "strobist info": types of flashes used, power settings, reflectors- whatever information you think would help other photographers in their quest for the perfectly lit photo.
Download my free strobist symbols and lighting diagrams for Adobe Illustrator and Adobe Flash, Vol 1. You can get this on my website, www.blueturban.net under "free stuff". A preview of the document is below: