I started using Keychain with Steem Monsters and I have been very impressed with it.  Since I have to sometimes get into my Steem Monsters account and my wife's on the same computer, this makes it  very easy.  That is very exciting about communities.  I still can't quite wrap my head around how they are going to work and what the benefit will be, but I know it is something people have been wanting for a while.  That makes it exciting that it is finally going to become a reality.