This evening, I uploaded a downloads section at the heartbeat demo site. The modules the site is created with, are downloadable from the site.
The site is created with lots of features to look like a community site. The modules i used for this are flag, friendlist (currently disabled), facebook_status, user relation ships, ds, nd, nd_contrib, cd, ud and of course heartbeat. All heartbeat submodules are enabled.
Heartbeat logs its activity with both rules and custom code, provided in the heartbeat_example submodule and in the custom module at the downloads page. All blocks and pages are displayed on the site with next to it, the specific and current configuration for the demo site.
You can test most features by logging in with a character, or become a new user. Here you can see what characters are available.