Referring to the new features being built into Streams.
Have been taking the new conversation-container based architecture of the streams repository for a test drive.
Be advised that we're still at least a month or three until this is publicly available -- and most people won't see anything different. The changes are all happening beneath the covers, and will only be visible if you examine the ActivityStreams packets sent between servers.
But I just wanted to report that so far it's looking (and working) bloody great.