I ported Buddymatic from the Thematic Theme Framework. In a standard WordPress or WordPress MU blog, Buddymatic is functionally the same as Thematic. In a BuddyPress enabled WordPress MU install, the BuddyPress components in the framework are activated to provide BuddyPress theme functionality. Buddymatic and child themes can be used on WordPress, WordPress MU, BuddyPress home and BuddyPress member blogs.
Thematic child themes can be used with Buddymatic by changing the template (in style.css) from thematic to buddymatic. The child theme may require additional styling for the BuddyPress components. The framework uses buddypress.css in the child theme for BuddyPress specific css. Included in the download is a sample child theme and Coffee with Friends by Daisy Olsen.