• On top of activity stream, create a User status & twitter integration feature

Other Ideas

Work/Personal/Live stream is a microblogging/status casting application that allows an user to publish messages/updates

• the status would be displayed in user hovers, profiles and also be visible in the recent updates. 
• would be great if you could somehow attach labels to User Status updates. Like Twitter hashtags.
• it would be nice to able to comment, interact with another user's status updates, like on Facebook, Friendfeed