Valleywag has an excellent Cheatsheet on What is Digg? Basically, if someone asks you what is Digg, just send them there. It describes the basics, how it works, how to break it, Digg's competitors, the recent publicity on Digg, "How Digg fits the buzzwords," oh and don't say "I got digged," I believe it is "I was dugg." Full details on Digg at Valleywag.
The Original Search Marketing Event is Back!
SES Denver (Oct 16) offers an intense day of learning all the critical aspects of search engine optimization (SEO) and paid search advertising (PPC). The mission of SES remains the same as it did from the start - to help you master being found on search engines. Early Bird rates extended through Sept 19. Register today!