BuddyPress.org

Once v1.1 comes out in the next couple of weeks, this issue should be moot. There will no longer be bhome and bpmember themes. Instead, BuddyPress will adopt the parent/child theme architecture that WP 2.7 makes possible.

Backwards compatibility will remain for a while for those that want/need to use the old theming architecture. But it will eventually be phased out.

Learn more about parent/child themes in WordPress.