Our first large scale community site is officially 1 year old today. We founded z4-forum.com on 14th June 2007 as a replacement for a previous community of BMW Z4 enthusiasts that disappeared overnight.
We started from scratch with no information, no database and more importantly no members. In just 12 months the site has grown to have over 71,000 posts, over 5000 topics and nearly 1200 members (from Harrogate to Hawaii!). The site is growing more rapidly than ever and the knowledge base we have built up is unbelievable.
Z4-forum is a prime example of how a web community can be built up, with a bit of effort and the right people involved.