Activity stream aggregator FriendFeed launched a new feature called FriendFeed Rooms this afternoon, which are effectively topic-based accounts that anyone can create or join (depending on privacy settings). Users can then add links and messages to relevant content.
The main difference between Rooms and a normal FriendFeed account is the fact that multiple users can author it, and that you can’t pull third party feeds into the service.
FriendFeed usage continues to grow steadily, and has clearly gained from Twitter’s (a competitor of sorts) constant downtime. I still haven’t gone religious on it, though, as some have. That’s mostly because i don’t like having a third party service centralize all this data about me and then not let that data back out again. See my rant on the Centralized Me for more on that.