Roadmap heartbeat

This is a short guide for features within heartbeat. While trying use cases and talking to people who are building community sites, i think this will be very handy to follow what you can expect in the future after installing heartbeat.
This will be mostly links to the issue queue, so drupalista's can interact on the topic.

what's coming before the end of 2010 ...

Clone existing stream and the ability to alter its behavior
Adding panels integration
Pulling activity from external sources