1. Door64.com is a community of over 6,000 technology professionals in Austin and Central Texas that grew through word-of-mouth without any marketing budget.
2. The founder initially failed to build an engaging community on his first attempt in 2006 because he assumed what users wanted without proper research and added too many features too quickly.
3. In subsequent iterations, what worked was establishing a process to build momentum through incremental engagement, communicating the vision face-to-face, generating user-generated content by incentivizing members to post, and using Drupal as a content management system to power the online community features.