Looks interesting but from what I can tell currently isn't available on app stores to immediately try out. It does at least have a nice logo which is ultimately enough to make me try something :p

I'd like to see the slew of new messengers coming out also address one of the few areas keeping people on Facebook: group event planning. There's lots of places to chat, but not many alternatives for sharing and planning events with a wider group of people. Briar seems to offer blog and forum concepts, which is interesting, but everything seems to be lacking in the "event" aspect and that's unfortunately a bit of a sticking point for a lot of Facebook users (it's primarily what I use it for, still).