orecast crawled out of the wreckage of my previous company Hurricane Party. The idea was simple. Foursquare for the future. Instead of telling your friends where you are now with a check in, you'd "forecast" where you'd be later -- sort of like a passive invite for your friends to hangout. We used the Lean Startup methodology, iterated quickly, and built a product people actually wanted to use. Over the next twelve months we grew to 100,000+ users, garnered some respect from peers and press, and learned a shit ton about product development.