From 2001 until mid 2007 we managed the largest networking events in Beijing and Shanghai. The community had a website since 2002 and since 2005 we coded it ourselves; first hand-coded (with tables, arghhh), then HTML and CSS and later with WordPress.
The current version is built on soblossom, our in-house developed WordPress Starter Theme, but a previous version we built as a Child Theme of Twenty Ten, at the time the new default theme of WordPress.
That Child Theme only used the pages post-type as the real dynamic content came from the pictures of members.
All different iterations of the website can be seen on the domain that is still live and currently for sale.